A wave of nostalgia hit Us after Vanessa Hudgens made a rare public acknowledgment of ex-boyfriend Zac Efron. "Remember when Zac Efron made history by becoming the FIRST ever vlogger as he created 'Zac Cam' to record behind the scenes of High School Musical," read a message shared alongside a clip of Efron, now 38, via Hudgens' Instagram Story on Wednesday, January 21. In the video, a young Efron took viewers around the Disney film's set on July 26, 2005, showing some of the less glamorous set pieces like battery packs and giant air conditioning tubes.