Kimberly Leadbetter (born November 20, 1979), known professionally as Mona Lisa, is an American pop and R&B singer-songwriter, actress, model, and record producer. She is best known for her debut single "Can't Be Wasting My Time" featuring the hip hop group Lost Boyz, which was featured on the Don't Be a Menace to South Central While Drinking Your Juice in the Hood soundtrack, as well as her debut album 11-20-79.

In 2011, her collaboration with labelmate DL, "First Klass (That Lyfe)" was released as a digital single. It's the lead single for the King of Paper Chasin' soundtrack. Her song, "Once Upon a Time" (written by Dennis Cooper) appeared in the film, The Heart Specialist which was released in 2012.