4. 17 Again
Of all the body swap films that have polluted Hollywood, this one is downright bizarre. Matthew Perry is given the chance to relive his teenage years as Zac Efron. Great. Except hes living as a teenage version of himself in his adult world. So he makes friends with his children, poses as his best friends son and tries to convince his thirty something year old wife that he loves her... whilst in the body of a seventeen year old. Lovely job. Its quite poorly executed, allowing for a bunch of awkward scenes and a plot that is stretched as far as humanly possible. Aside from that, the film comes at the start of Efrons post-High School Musical career... so before he chose any real acting roles. So nobody actually remembers the film and it will eventually be found in the bargain bins at the back of Tesco.