Christina Aguilera blonde singer cop nightclub premiere Christina Aguilera blonde singer cop nightclub premiere

Last night Christina Aguilera partied at Premiere nightclub in Hollywood, and the newly single singer rocked a naughty cop outfit, complete with handcuffs and loads of her signature red lipstick.

Xtina appeared to be having a grrrreat time, blowing kisses from the car and waving to fans as she left. Wonder what Jordan was up to last night? Maybe watching over their 21-month-old son Max?