Katy Perry flashes her bra in completely sheer floral outfit as she dances with Ellie Goulding inside BRIT Awards

AFTER the party it’s the after party, and after the Brits Katy Perry made sure that she partied like a champion with fellow singer Ellie Goulding.

The pop star hit Universal’s star studded bash, where she let it all hang out in an unbuttoned sheer top that exposed her black bra underneath.

 Ellie Goulding and Katy Perry spent the evening bouncing away behind the decks with Nick Grimshaw at the Universal party

Ellie Goulding and Katy Perry spent the evening bouncing away behind the decks with Nick Grimshaw at the Universal partyCredit: Getty Images

Dancing behind the decks with DJ Nick Grimshaw, Katy was in high spirits and allowed her colourful dress to fall open.

The dress, covered with an all over red rose print, was a sheer, floor-length design by American designer Adam Selman.

Selman is famed for his work with Rihanna, with whom he first teamed up with in 2011. Over a period of two years Adam was responsible for over 100 of Rihanna’s outfits.

 They laughed and joked as Grimmers threw down an energetic selection

They laughed and joked as Grimmers threw down an energetic selectionCredit: Getty Images
 Katy and Ellie teamed up for part of the evening

Katy and Ellie teamed up for part of the eveningCredit: Getty Images
 All three stars seemed to be in high spirits at the party

All three stars seemed to be in high spirits at the partyCredit: Getty Images
 Katy's dress was unbuttoned, exposing her bra

Katy’s dress was unbuttoned, exposing her braCredit: Barcroft Media

He set his own label in 2013 but continues to make outfits for her, including the infamous see-through number she wore at the CFDA Fashion Awards in 2014.

Ellie Goulding wore a simple LBD with matching heels and a silver charm necklace.

Both women bounced around as Grimmers worked his way through a high energy set.

 Both Ellie and Katy had changed into something a little less formal for the evening's festivities

Both Ellie and Katy had changed into something a little less formal for the evening’s festivitiesCredit: Getty Images
 Ellie and Katy pose for a snap at the Universal after party
Ellie and Katy pose for a snap at the Universal after partyCredit: Getty Images
 Katy happily posed for photos next to a leopard pring Volkswagen Beetle after the party

Katy happily posed for photos next to a leopard pring Volkswagen Beetle after the partyCredit: Splash News
 Katy Perry posted this pic of her wearing the Adam Selman designed dress

Katy Perry posted this pic of her wearing the Adam Selman designed dressCredit: INSTAGRAM

They laughed and joked with the Radio 1 DJ as he kept them entertained, having a whale of a time.

Both women had changed their outfits for the evening’s festivities, both opting for slightly less formal attire than they had at the awards ceremony.

At the Brits, held at London’s O2 arena, Katy had tied her hair up harshly into a series of elaborate top knots.

 Rihanna in her Adam Selman number in 2014

Rihanna in her Adam Selman number in 2014Credit: Getty Images – FilmMagic
 Katy's chain mail Versace outfit was a hit on the red carpet

Katy’s chain mail Versace outfit was a hit on the red carpetCredit: Getty Images
 Ellie Goulding poses with her sister Jordan

Ellie Goulding poses with her sister JordanCredit: Getty Images

She wore a matching chain mail dress and jacket by Versace, which was pink and shades of grey.

Katy teamed the items with a pair of metallic effect heels and a bronze choker.

During her performance she changed into a suit, singing amongst a group of dancers who were dressed as houses.

 Katy wore a pinstriped suit for her performance

Katy wore a pinstriped suit for her performanceCredit: PA:Press Association
 The singer's political performance featured skeleton representations of Donald Trump and Therea May

The singer’s political performance featured skeleton representations of Donald Trump and Therea MayCredit: PA:Press Association

Katy chose to make an overt political statement with her performance, bringing out a couple of skeleton puppets which represented Donald Trump and Theresa May.

Perry’s team explained that the bouncing paper houses represented the crumbling of the American Dream.

Meanwhile Ellie Goulding’s red carpet ensemble comprised a daring black number with an open front held together by gold effect chains, with a slash down the left leg.

Both women left the Universal bash with a skip in their step, Ellie looked groggy while Katy happily posed for pictures next to a Volkswagen Beetle covered with leopard print.