Did you know that Zac Efron didn't do all the singing for HSM 1?

HSM 1, yes, that's common knowledge - especially since Drew Seeley then went on the HSM concert tour and sang the part of Troy. Zefron's voice wasn't high enough for the songs, I believe he had singing lessons afterwarRAB.

He sang everything in HSM2 and Hairspray himself.
 
He also sang the first few lines of Breaking Free but, apart from that it was Drew Seeley. I prefer Zac's singing voice though.
 
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