What is a good song to sing for a talent show?

My friend and I are planning a duet for the talent show aat our school. We were going to do Baby by justin beiber but everyone at our school hates him so we're looking for something else. Something fun and popular and with as little auto tuning as possible. Any suggestions? P.S. we're two high school junior girls I'm an alto and she's a saprano and it doesn't matter if the song is by a boy or a girl cuz we can tweek it