Zac Efron over the years: 21 sexiest stares (Photos)

Slideshow posted in Photos | Wednesday, September 18, 2013

5 of 21: The 'Seal-Of-Approval' stare: Zac Efron gives the thumbs up at a fan event for his latest film, the R-rated 'That Awkward Moment,' in Los Angeles on Oct. 15, 2013. ( Photo / Justin Campbell / Startraksphoto.com)