lead singer and songwriter of the alternative rock band Tonic. Tonic’s first release, Lemon Parade, was a multi-platinum success, featuring the hit songs, "Open Up Your Eyes" and "If You Could Only See," which became radio’s most played Rock Song of 1997.
In 1999, Tonic returned with their second album and the Mainstream Rock hit "You Wanted More.” Tonic released their third LP, Head On Straight in 2002, receiving two Grammy nominations. Hart also co-wrote the 2005 Ingram Hill hit "Almost Perfect" which reached top 25 on the Hot AC chart. In 2007, Hart signed a solo record deal with EMI/Manhattan Records and released Cigarettes and Gasoline in. The album spawned two top 20 hits at Pop Radio with "If You're Gonna’ Leave" and "I Wish The Best For You.” In 2009 Tonic reformed resulting in multiple tours and a Greatest Hits release followed bythe self-titled “Tonic,” in 2010. Emerson has begun work a new solo career.