Tulisa Contostavlos was spotted partying last night with Mary J. Blige, Kelis and Paris Hilton to name a few, at the Belvedere Pre-Grammy Awards bash.

The X Factor judge couldn't have looked happier posing on the red carpet with a big smile on her face. She opted for a classy look wearing a white shift dress with plan peep-toe heels and a matching black and white striped clutch bag.

Tulisa was no doubt mingling with the stars once inside, which included Mary J. Blige who looked younger than her 41-years in a fitted gold mini-dress; and Kelis who rocked a backless yellow dress teamed with her trademark afro.

Kelis was spotted hanging out with socialite Paris Hilton who spent most of the night by the DJ booth with her boyfriend Afrojack.

Could Tulisa be working her way to fame in the U.S.? Check out the pics from the night in the gallery below.

Tulisa parties with Mary J. Blige and Kelis at Pre-Grammy Awards bash...