Zac rose to fame in Disney's High School Musical and has since starred in Hairspray and Charlie St Cloud, becoming an international heartthrob in the process.
We always knew he was a massive animal lover, but the actor has well and truly revealed his sensitive side in a deeply emotional Instagram dedication to his lately deceased dog.
Find out which stars have made it on to our 'Sexiest Man on the Planet' list.
Kevin McCallister's big brother Buzz doesn't spend his time messing around with his mini-me anymore...
Austrian skydiver Felix Baumgartner is a hit with the ladies in the office. Do you agree?
Former Blue bandmates Duncan James and Simon Webbe have been comparing their six packs while on holiday in Dubai. We take a look at some great celebrity six packs here...just for the hell of it!