EXCLUSIVE: PEOPLE's HSM Shoot!

See outtakes from our photo shoot with Zac, Vanessa, Ashley and all the stars of High School Musical 3: Senior Year

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Efron's on- and off-screen girlfriend, Vanessa Hudgens, also goes for a dip in the pool – albeit in a flowery inner tube – during the shoot with photographer Michael Lavine, who's also snapped the Jonas Brothers, Cher and 50 Cent.