Revealing tops and thigh-skimming miniskirts are wardrobe essentials when it comes to The Saturdays' on-stage ensembles.
But pregnant Frankie Sandford opted for a more conservative look as she joined her bandmates at the Capital FM Summertime Ball on Sunday.
Instead of sporting the same cleavage-baring basque tops as her bandmates, Frankie opted for a more comfortable billowing vest top and loose black trousers.
Covering up: Pregnant Frankie Sandford opted for a loose-fitting top and trousers in contrast to her Saturdays bandmates' revealing basque tops and shorts at the Capital FM Summertime Ball on Sunday
Posing up: Frankie posed next to bandmates (left to right) Una Healy, Vanessa White and Mollie King ahead of their performance
The 24-year-old singer did, however, add some glamour to her ensemble by wearing a pair of sky-high heels and wearing her new long hair loose in tumbling curls.
And when Frankie took to the stage to perform hits including All Fired Up with the girls, she did reveal a bit more as she flashed the fluorescent pink bra she was wearing under her top.
However, Frankie's footwear choice perhaps wasn't the best option for a long day of hard work, as the singer tweeted her fans that she was enjoying some of the perks backstage at the Wembley Stadium event.
Blooming: Frankie is expecting her first child with fiancé Wayne Bridge
Playing it safe: Despite her relatively conservative outfit, Frankie added some glamour with a pair of sky-high heels
She wrote: 'Having an amazing foot massage backstage while listening to The Wanted sound check. I suppose someone's got to work! Lol.'
When it came to their wardrobe choices, Frankie's bandmates didn't follow her example by covering up.
Mother-of-one Una Healy upped the sexiness of her outfit by teaming her metallic corset-style top with a pair of high-waisted pink hotpants and shoe boots.
Strutting their stuff: The girls looked in good spirits as they took to the stage
Hot pink: Frankie flashed a hint of bra as she performed, while Una was working her metallic top
Still smiling! Frankie grinned from ear to ear as she busted a move on the stage
Nautical but nice! Vanessa showed off her slim figure in her top and paper-bag top trousers
Mollie King opted for a similar look in her ensemble, as she paired her top with silky purple shorts.
Vanessa White, meanwhile, appeared to be in solidarity with pregnant Frankie, choosing to wear her top with a pair of loose-fitting purple trousers.
Absent from the occasion was Rochelle Humes, who is still on maternity leave following the birth of her daughter Alaia-Mai - her first child with husband Marvin Humes.
Leggy ladies: Una and Mollie both opted for shorts to show off their enviable figures
Cleavage-baring: The girls didn't hold back with their revealing top choices
Make-up fans: Frankie and Vanessa certainly didn't hold back with their make-up for the occasion
You look different! Marvin Humes made up for his wife Rochelle's absence from the event as he posed up with her bandmates
But Rochelle's absence in the group was made up for by former JLS star Marvin, who opened the star-studded event with an energetic DJ set.
And tweeting a picture of himself with The Saturdays, Marvin wrote: 'They're missing my baby @RochelleTheSats don't worry Roch I'm gonna fill in today!!! X'
Rochelle later tweeted on her own account: 'Good luck to @TheSaturdays and @MarvinHumes performing @ the @CapitalOfficial Summer time ball. Love u lots xxxxxx'
Hit makers: Nathan Sykes rejoined his band The Wanted on stage at the Summertime Ball after being off sick following emergency throat surgery
Giving it his all: The 20-year-old sang his heart out for the crowd as the band performed
Good to be back: Tom Parker was seen jumping on Nathan, clearly excited to have the full band back together
The Wanted kicked off the action at the Wembley Stadium, with Nathan Sykes making a welcome return to the group following emergency surgery on his vocal chords.
The 20-year-old singer joined the band on stage at the event for the first time in weeks, after suffering a hemorrhaging nodule.
Nathan seemed delighted and somewhat overcome with emotion to be back performing, later thanking his fans on Twitter.
Let me here you: Nathan loved his time on stage, following weeks of rest and recuperation
Hi tracks: The quintet performed some of their biggest hits including All Time Low and Glad You Came
What a flirt: Max was seen eyeing up a pretty dancer as he sang away with his band in front of the 80,000 strong crowd
Writing on the social networking site he said: 'Thanks for all the love today. Really put a smile on my face …'
The band's group account uploaded a picture of the band along with the caption: 'He's back!!!!!!!!! #WelcomeBackNath.'
Nathan certainly made sure his first performance back with the group was one to remember and he sang his heart out to the crowd at Wembley.
Hello gorgeous: Justin Timberlake opened the show by stepping out of a bright red phone box
What a crowd: The American hitmaker looked rather dapper in a smart suit and tie and told the crowd they were looking 'pretty good'
Huge crowd: 80,00 fans gathered to watch the concert at Wembley
Ahead of the concert Nathan had admitted he would be 'gutted' if he had to miss out on performing.
Before appearing on stage the rest of the band, Max George, Siva Kaneswaran, Jay McGuinness and Tom Parker told the crowd that Nathan wasn't well enough to perform.
He emerged and belted out a solo to I Found You in front of the 80,000-strong crowd.
That's a bit risque! Jessie J performed in a string dress with barely there underwear on
Hitting the high notes alright: Olly Murs was seen jumping up into the air during his set
The boy band also performed their hit tracks Glad You Came and All Time Low during their set.
Following their set Nathan spoke about his return to the group.
He said: 'I'm going to miss my days of Jeremy Kyle, This Morning and the Playstation, but it is great to be back.'
Bandmate Max George added: 'It feels pretty awesome. We've missed him. We've been slogging it out for over two months now as a four.
Scream and shout: will.i.am was joined on stage by dancers dressed in similar outfits to himself
'We have to do a lot less now he's back because he's quite heavy with the vocals which is cool for the rest of us.'
A host of musical acts performed during the star-studded show, which was presented by the king of cool, Justin Timberlake.
The hitmaker arrived on stage to open the show and told the crowd that they were looking 'pretty good'.
Here we go! Ellie Goulding performed in an all white outfit and a pair of platform trainers
Flying high: Ellie performed her hit tracks Anything Could Happen and Starry Eyed for the crowd at Wembley
Keeping it quirky: Eliza Doolittle crouched down to nearly sit on the floor during her performance
Dressed in a dapper suit, crisp shirt and a black tie Justin emerged from a bright red phone box.
Justin introduced Ellie Goulding and the singer emerged on stage in an all white outfit.
The blonde beauty opened her set with her hit track Anything Could Happen and she also sang her 2010 song Starry Eyed.
Closing the show: Robbie Williams ended the Capital FM Summertime Ball with his set
He's got #thatpower: Will.i.am was joined by some futuristic male dancers for his routine
Here come the boys: James Arthur and Labrinth were among the other male performers at the event
Former X Factor contestants Union J were met by screams as they took to the stage
Having a laugh: Rizzle Kicks got the crowd on their feet
Ellie was seen in no less than three different outfits during the day, posing for snaps in alternative outfits both before, and after, her stint on the stage.
Other stars to take to the stage during the day included The Saturdays, although the girls were minus new mother Rochelle Humes.
The girls donned matching metallic outfits although Frankie Sandford, who is currently pregnant with her first child, opted for a maternity-style number.
While the other girls dressed in skimpy basques and shorts, the mother-to-be wore a loose fitting purple top and a pair of black trousers.
Off he goes: Psy showed off some of his signature dance moves on stage as he performed his new track Gentleman
Can we hear you? Andy Brown tried to get the crowd to make some noise during Lawson's set
American singer Taylor Swift also attended the event, fresh from performing on Britain's Got Talent on Saturday night.
The I Knew You Were Trouble singer showed off her slim pins in a pair of shorts, paired with a cream and black blouse.
Her seemingly endless legs with elongated thanks to a pair of cage black heels.
Club Tropicana: Ella Henderson wore a summery sunset print dress
Leggy lady: Taylor Swift wore a pair of black shorts with a cream and black blouse for the event
Who knew they were friends! Jessie J posed up with Robbie Williams backstage at the bash
Other acts at the event included AlunaGeorge, Korean rapper Psy and boy band Lawson.
Psy spoke about his hit track Gangnam Style, which turned into a viral sensation and saw millions of fans emulating his dance moves across the globe last year.
He admitted that he would always be expected to perform the humorous number one track throughout his career.
Why wear just one outfit? Ellie wore different outfits before and after her performance but seemed to stick to black and white hues
Too cool for school: AlunaGeorge looked effortlessly cool as they posed for snaps ahead of the concert
Interesting look: Rapper Psy wore a waistcoat and fisherman trousers to the evening along with a bow tie
Psy explained: 'It's my lifetime biggest hit ever and I think it's going to be for ever. Until the day I retire I've got to do that horsey thing.'
'But I've got to move on so I'm working on the new album right now so I've got to have a lot of songs several years later from now. But still at that time Gangnam Style is going to be the strongest song I think.'
Capital FM presenter Lisa Snowdon wore a short leather skirt teamed with a salmon and peach blouse.
The broadcaster displayed a deep tan and emphasised her slim pins with a pair of patent heels.
Hot stuff: Radio presenter Lisa Snowdon looked stunning in a black leather skirt teamed with a peach and salmon coloured blouse
Lots of names: Rizzle Kicks and Disclosure also attended the event
We predict an earthquake: Labrinth seemed delighted to be at Wembley and literally jumped for joy
Sharp dresser: will.i.am wore a pair of dark jeans and a denim and gold biker jacket
Read more: http://www.dailymail.co.uk/tvshowbiz/article-2338461/Pregnant-Frankie-Sandford-covers-billowing-loose-trousers-joins-basque-wearing-Saturdays-bandmates-Summertime-Ball.html#ixzz2VaPHo400
