Zac Efron @ MuchMusic

Hairspray dreamboat Zac Efron lays a big wet one on co-star Nikki Blonsky at Canadian TV’s MuchMusic to promote the film version of the Broadway musical. Actually, Zac kisses Nikki not once, but three times as co-stars co-stars Elijah Kelley and Amanda Bynes cheered them on.

“I’m in so much trouble,” exclaimed Zac, wiping his mouth after the mini-make-out session. That’s right. Lay the smackdown, Vanessa! Watch the video of Zac and Nikki going at it below!!

CONTEST: To help promote Hairspray, which is out next Friday, July 20th, JustJared.com is giving away two sets of fan masks of the entire cast — Zac Efron, John Travolta, Nikki Blonsky, Amanda Bynes, Christopher Walken, Elijah Kelley, Queen Latifah, Michelle Pfeiffer, Brittany Snow and James Marsden. They’re already being sold on eBay!!!!!!

HOW TO WIN: Leave a comment here with a valid email address (will not be published) and two winners will be chosen at random at the end of the contest. One entry per person. This contest ends on Thursday, July 12 @ 7PM EST. Good luck! The contest is now over. Congrats to LJ and StickyKeys, your fan masks will be sent out soon!!