Selena Gomez celebrated her 20th in style as the star studded crowd at this year's Teen Choice Awards sang her Happy Birthday.

Stars including Taylor Swift and Gordon Ramsey were in the crowd singing as the actress and singer tried to hide her face on stage. Her boyfriend, Justin Bieber, was also in the crowd on a night they both won awards.

Selena picked up the prize for Choice music group for her work with her band, Selena Gomez and the Scene.

Canadian pop star Bieber received a four gongs, adding up to a total of 12 Teen Choice awards in a span of three years.

Before accepting his surfboard shaped award, the singer performed song, Boyfriend, and latest single, As Long As You Love Me, with rapper Big Sean. The singer's wins for the evening include Choice music male artist and single by male artist for Boyfriend.