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Theophilus Musa London (born February 23, 1987) is a Trinidadian-born American rapper and singer.

Theory of a Deadman (abbreviated as Theory or TOAD) is a Canadian rock band from Delta, British Columbia, formed in 2001.

These New Puritans are an English music group/band from Southend-on-Sea, England.

Thin Lizzy are a hard rock band formed in Dublin, Ireland, in 1969.

Third Day was a Christian rock band formed in Marietta, Georgia during the 1990s. The band was founded by lead singer Mac Powell, guitarist Mark Lee (both of whom were the only constant members) and Billy Wilkins.

Third Eye Blind is an American rock band formed in San Francisco in 1993.

Thomas Edward Yorke (born 7 October 1968) is an English musician and the main vocalist and songwriter of the rock band Radiohead.

Thomas Rhett Akins Jr. (born March 30, 1990), known professionally as Thomas Rhett, is an American country music singer and songwriter.

Thompson Square is an American country music duo composed of husband and wife Keifer and Shawna Thompson, both of whom alternate as vocalists.

Thousand Foot Krutch (often abbreviated TFK) is a Canadian Christian rock band formed in 1995.

Three 6 Mafia is an American hip hop group from Memphis, Tennessee formed in 1991.

Three Days Grace is a Canadian rock band formed in Norwood, Ontario in 1997.