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In the new movie "17 Again," Matthew Perry wakes up in the 17-year-old version of his own body, which just so happens to look like Zac Efron (and we're sure Perry looked just like Efron as a youngster). We haven't seen the movie yet, but you can bet your own body that wacky high jinx will most definitely ensue, at least if "17 Again" is like all the other body-switching movies Hollywood has made over the years.
Click through to see 10 of the most memorable ones!
From Crowd Ignite