Zac Efron did not sing "Bet on Me" in any of his films or projects. That song is performed by The Score, a Canadian electronic music duo.
While Zac Efron is known for his musical talents, he has never sung "Bet on Me." He did sing in films like "High School Musical" and "Hairspray", and he even released a solo album in 2006. However, "Bet on Me" was not part of his repertoire.