Claim: Leighton Meester is an actress.

Leighton Marissa Meester -LRB- born April 9 , 1986 -RRB- is an American actress , singer-songwriter and model . She is mostly known for her starring role as Blair Waldorf in the drama series Gossip Girl -LRB- 2007 -- 2012 -RRB- . She has also appeared in the films Killer Movie -LRB- 2008 -RRB- , Country Strong -LRB- 2010 -RRB- , The Roommate -LRB- 2011 -RRB- , Monte Carlo -LRB- 2011 -RRB- , The Oranges -LRB- 2011 -RRB- , and The Judge -LRB- 2014 -RRB- . Meester made her Broadway debut in Of Mice and Men -LRB- 2014 -RRB- .   In addition to acting , Meester has also ventured into music . In 2009 , she featured on Cobra Starship 's `` Good Girls Go Bad '' which charted on the Billboard Hot 100 , and released her first single `` Somebody to Love '' under Universal Republic . Her second single `` Your Love 's a Drug '' was released in 2011 . Meester has also recorded songs for various soundtracks . Her debut album , Heartstrings , was independently released in 2014 . She has also modeled , having been the face of brands such as Jimmy Choo , Herbal Essences , and Vera Wang .