"It's My Party" is a song most famously sung by American singer Lesley Gore in 1963. This song hit #1 on the pop and rhythm and blues charts in the United States. "It's My Party", peaked at #9 in the United Kingdom, becoming Gore's only major hit there. It was the first hit single for producer Quincy Jones.
A 1981 remake by Dave Stewart and Barbara Gaskin was a UK number one hit single for four weeks and was also a major hit in Austria (#3), Germany (#3), the Netherlands (#26), New Zealand (#1), South Africa (#3) and Switzerland (#6). The track reached #72 in the US. This was the first version of the song to reach #1 in the UK.