The Boom Clap singer attended the party hosted on Saturday night alongside some other familiar faces such as Breaking Bad actor Aaron Paul and American comedian David Spade.

Opting for a one shouldered pastel dress with high slit the 22 year old Brit brought an equal amount of chic and rock to the red carpet.

American reality star and fashion designer Gretchin Rossi also made an appearance looking gorgeous in a fabulous two piece.