Karrueche Tran all smiling as she parties the night away at Christina Milian's surprise bash

Karrueche Tran looked like a girl who was ready to party when she hit her best friend Christina Milian's surprise birthday bash on Wednesday night. 

Dressed in a plunging leather dress, the 27-year-old star appeared in sprightly spirits as she hit Los Angeles' Beso restaurant.  see another photos after the cut..

Always one to put on a stylish display, the fitness enthusiast showed off her slender frame in a provocative low-cut gown.