Does singing count? If so then it was "Diggin' the Dancing Queen" because I was singing "Dancing Queen" by ABBA. If not it was "Hey Pedy" I was talking to my cat Pedy.
EDUT: Now it was "I doubt it Sharona" because I saw my sister's homework and an answer looked wrong so I just said "I doubt it Sharona" even though she's at school. She has to go to school and I don't haha it's Teacher Only Day for us!