Melissa Janis Lefton (born August 13, 1975) is a singer and songwriter.

Lefton began playing keyboards at the age of 10. After finishing high-school she moved to New York to study communications at New York University, though decided to also focus on a career in music while studying. Melissa joined the punk rock band "Product" answering an ad Lefton was also once referred to as the "anti-Britney." Seattle Weekly called her "cute, perky and evil incarnate."

Three of Lefton's songs from 2001 were commercially released. "I Love Life" appeared on the soundtrack to The Princess Diaries. "My Hit Song" appeared on the soundtrack to On the Line and also appeared on the compilation album Cool Traxx! 3. Her cover of "He Blinded Me with Science" appeared on the soundtrack to Jimmy Neutron: Boy Genius. Her track "Radio Rainbow" appears in the film Halloweentown II: Kalabar's Revenge, though the film did not release an accompanying soundtrack.

In an attempt to salvage her career, the label set her up with a manager who sent her to Los Angeles to become an actress. Discouraged with the roles she was offered she returned to New York City. She spent several years working professionally as a commercial jingle writer; Lefton's vocals can be heard in the famous commercial for Pepsi by Britney Spears as well as ads for T.J. Maxx and Chevrolet. By 2006, Lefton was in a sunshine pop band named Hello.