Gone is the Disney princess image! Selena Gomez unleashes her inner rebel, rocking devil horns to mark her birthday alongside her friend Lily Collins.

Birthday girl: Selena Gomez celebrated her upcoming 21st birthday on Saturday night with pal Lily Collins at the Hollywood Roosevelt Hotel

Birthday queen: Selena Gomez had a blast on Saturday night as she rang in her highly anticipated 21st birthday at the iconic Hollywood Roosevelt Hotel, accompanied by her close friend, Lily Collins.

The lady is a vamp: Selena ditched her good-girl image to celebrate her milestone birthday

The lady is a vamp: Selena ditched her good-girl image to celebrate her milestone birthday

Selena breaks free from her innocent reputation and embraces her inner vamp to commemorate her special birthday.

Little devil: The singer and actress, who accessorised her LBD with red devil horns and a black feather boa, was all smiles as she was presented with a cake

Mischievous Imp: The talented musician and performer, who spiced up her little black dress with fiery devil horns and a luxurious black feather stole, radiated joy as she gleefully accepted a delectable cake.

Feeling shy: The gorgeous brunette, whose birthday is actually on Monday, hid her face as BFF Lily drove her to her party at the Hollywood hot spot

Experiencing shyness: The beautiful brunette, whose actual birthday falls on the upcoming Monday, covered her face bashfully while her best friend Lily chauffeured her to the glamorous Hollywood hotspot where her party awaited.

New 'do: The star emerged from the hair salon in West Hollywood on July 19 with poker-straight locks - a more mature look for the tween favourite

Fresh Style: The celebrity stepped out of the fashionable hair salon in West Hollywood on July 19th sporting sleek, straight hair – a sophisticated transformation that adds to the tween idol’s maturing image.