Watch Zac Efron Struggle to Remember 'High School Musical' Lyrics

Zac Efron (as Troy Bolton), Vanessa Anne Hudgens (as Gabriella Montez) in High School Musical.

Devastating news: Zac Efron doesn't spend every day singing High School Musical songs.

How do we know? In a recent interview with Cosmopolitan UK, where he was promoting EDM lifestyle flick We Are Friends (directed by Catfish's Max Joseph), Efron played a game where he had to ID songs based on their intros. After breezing through "Drunk in Love," Efron took a tumble when the opening notes of HSM song "Breaking Free" played. 

To his credit, he instantly knew it was from the trilogy, but couldn't ID the exact name of the tune his character Troy Bolton sang at the end of the first film. "Soaring and Flying?" he wondered, correctly guessing a lyric -- but not the title -- of said song. "There's like three movies of songs!" he laughed.

Correct, Mr. Efron. And every single one of them is catchy and perfect. 

H/T Us Weekly