Justin Bieber, Diddy Hit Usher's 35th Birthday Party

Usher has celebrated his 35th birthday surrounded by a string of famous friends.

The R&B superstar, who turned 35 yesterday (October 14), partied alongside the likes of Justin Bieber, Sean "P Diddy" Combs, Cassie, Miguel and Pretty Little Liars actress Ashley Benson at the big event.

The 'S&M Cirque de Soleil' themed party was held at the swanky Bootsy Bellows club in West Hollywood, complete with hookahs, female dancers in bubbles and S&M puppets.

Yeah singer Usher danced up a storm with his celeb pals and later blew out the candles on a boxing ring style cake featuring a baby photo of himself in the centre.

Several A-List stars also took to Twitter to wish the star a happy birthday including talk show host Ellen DeGeneres and Usher's The Voice USA co-judge Shakira.

Images: © Instagram / @howuseeit