Emerson Hart is a songwriter, vocalist, guitarist and producer. He is the 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", the latter of which became top 10 most played rock in 1997. In 1999, Tonic returned with their second album and the mainstream rock hit, "You Wanted More". In 2002, Tonic released their third LP, Head On Straight. Emerson has also written songs for Ingram Hill, The Jayhawks, Sister Hazel, Honey Ryder, Green River Ordinance, and others.

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