"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.

The song's chorus, "It's my party, and I'll cry if I want to... You would cry too if it happened to you," became a part of American pop cultural language as a phrase used to describe being utterly humiliated and miserable during an event that is supposed to be a happy occasion.