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KSDK – Before Tonight Show guest Zac Efron was a heartthrob known for occasionally 'getting in fights' on Skid Row and starring in the film "Neighbors," he was just a teenager singing about "Breaking Free" in a hit Disney Channel original movie.

We'll never forget, Zac…

Watch Efron, New York Times darling Guy Fieri, Jadeveon Clowney and depressing pet commercial singer Sarah McLachlan tonight on the Tonight Show Starring Jimmy Fallon at 10:35 p.m. – right after NewsChannel 5 at 10 p.m.

Efron appeared in a Jimmy Fallon skit last night with Seth Rogen…and it was pretty funny.

Familiarize yourself with some more of Efron's exemplary "High School Musical" work by watching the videos below:

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