Zac Efron recently sat down to rewatch his old movies but the video of his trip down memory lane has fans distracted by his jeans. Not many people can say they were thousands of people’s first love, but Zac Efron isn’t just anybody. The 36-year-old American actor became a teen heartthrob for the ages when he burst onto the scene as Troy Bolton in the High School Musical franchise. The trilogy wrapped in 2008 and a year later he proved he was the real deal with a layered performance in the comedy 17 Again. Zac may not have the power to, well, be 17 again, but he can do the next best thing and r…