Leighton Meester's had a busy New Year's, performing in venues in Miami, Chicago and Las Vegas — where she spent Saturday night. Arriving at Tao in a bright green dress, Leighton looked almost Blair-esque, before she changed into a casual sexy outfit, including a sheer t-shirt that showed off her underwear, and put on her show for the crowd. Cavorting with her dancers and getting down on the floor, Leighton's definitely enjoying her dual life as an actress and a pop star — taking advice to heart from Cyndi Lauper — but which do you prefer, actress Leighton or singer Leighton? Let me know!
To see more photos of Leighton in Las Vegas, just read more.