Bob Geldof is an Irish musician, songwriter, and political activist, best known as the lead singer of the rock band The Boomtown Rats. He gained international fame in the late 1970s and 1980s with hits like "I Don't Like Mondays." In addition to his music career, Geldof is recognized for his humanitarian efforts, particularly in response to the 1980s Ethiopian famine. He co-founded the charity event Live Aid in 1985, which raised millions for famine relief and brought global attention to the crisis.