It's My Party" is a pop song recorded by multiple artists since the 1960s. In 1963, American singer Lesley Gore's version hit #1 on the pop and rhythm and blues charts in the United States. It was the first hit single for producer Quincy Jones. Lesley Sue Gore (born Lesley Sue Goldstein; May 2, 1946 – February 16, 2015) was an American singer, songwriter, actress, and activist. At the age of 16, in 1963, she recorded the pop hit "It's My Party", and followed it up with other hits including "Judy's Turn to Cry", "You Don't Own Me", and "California Nights". Gore also worked as an actress and composed songs with her brother Michael Gore for the 1980 film Fame, for which she was nominated for an Academy Award. She hosted an LGBT-oriented public television show, In the Life, on American TV in the 2000s, and was active until 2014. (source Wikipedia )