By Daily Mail Reporter
Opposite ends of the spectrum: Mollie King kept it demure in her chic white number while Frankie Sandford maybe should have a little more covered up
Mollie King was joined by some of her popstar friends as she celebrated her birthday last night.
She took a large group of friends, including her Saturdays bandmates and members of boyband JLS, to Mahiki in Mayfair, London.
The birthday girl, who turned 24, looked great in a classy white number but it was bandmate Frankie Sandford who stood out like a sore thumb in a revealing black number.
Bottoms up: Frankie's male friend can't help but stare at her behind as they leave Mayfair nightspot Mahiki
The 22-year-old turned up in a see-through dress which made her underwear clearly visible to anyone who passed a glimpse at her - including a male companion who couldn't help but stare at her rear.
She completed the outfit with a matching pair of black ankle boots.
While Mollie sported a white dress with ruffled detail on the lower half, hemmed in with a metallic gold belt and accessorised with a pair of tan coloured peep toe heels.
Celebrations: The Saturdays singer was joined by friends and bandmates for the party which took place at Mahiki
Saturdays night out: Rochelle Wiseman and Vanessa White make their way out of Mahiki in Mayfair following Mollie King's birthday get together
With the two ladies juxtaposed with another Mollie was the clear winner in the fashion stakes, looking demure and classy in comparison with her bandmate who perhaps should have covered up a little.
The Saturdays singer turned 24 yesterday and hit London club Mahiki with bandmates Rochelle Wiseman, Frankie Sandford and Vanessa White.
Rochelle, 22, wore a figure-hugging black dress with black piping and Vanessa opted for a grey number.
Let's hear it for the boys: Marvin Humes and Aston Merrygold were also in attendance for Mollie's birthday
Three's a crowd?: Marvin leaves the Mayfair club hand in hand with Rochelle and her bandmate Vanessa
JLS members Aston Merrygold and Rochelle's boyfriend Marvin Humes, were also on hand to make sure celebrations went with a bang.
Rochelle held hands with her boyfriend as they exited Mahiki, in Mayfair, central London.
The two split late last year, but got back together and appear to be stronger than ever now they have reconciled.
The only member of The Saturdays missing from the equation was Una Healy, who had to miss out on the evening's events due to a wedding.
On her way out: Mollie and her friends are pictured leaving the May Fair Hotel en route to Mahiki round the corner
She did however treat her bandmate to a pair of beige coloured heels, and also tweeted an apology.
Obviously over the moon with her gift, Mollie tweeted a picture of the platform heels with the caption: 'I've just received the most amazing birthday present from @unahealy!!!! I'm a very lucky girl x'
On Friday the girls were pictured leaving a London studio after a gruelling 20-hour photo session for their 2012 calendar.
Overdone?: Frankie says her terracotta complexion is down to her recent holiday and not fake tan
Frankie's dayglo tan became a talking point as she left the studio appearing to be a bright shade of orange.
The singer later took to her Twitter account to argue that she simply had a very deep holiday tan and it was not fake.
A few weeks ago Mollie went public with her new beau David Gandy at the British Heart Foundation 'Tunnel of Love' party..
Mollie and her Essex-born beau - now one of the highest-paid models in the country - met at a party in March, and have been quietly dating ever since.
The singer split from ex-boyfriend Andy Brown earlier this year.
Gandy, who became a household name for the Dolce & Gabbana advertisement showing him in a tiny pair of white pants, has been linked with Lily Cole and Lindsay Lohan.