Taking Back Sunday is an American rock band from Long Island, New York, formed in 1999. The group is known for their fusion of punk, pop, and melodic hardcore, characterized by emotional lyrics and intricate guitar riffs. The band's key members include Adam Lazzara, John Nolan, and Mark O'Connell. Their 2002 debut album, "Tell All Your Friends," is considered a landmark in the emo genre, significantly contributing to its early 2000s mainstream breakthrough.