10 Unbelievable Movie Cameos You Probably Missed

9. Matt Damon €“- Eurotrip

At the height of his success in 2004, just two years after The Bourne Identity, and a few months before its sequel was released Matt Damon made the questionable decision to appear as Donny in Eurotrip, a frankly rubbish teen sex comedy that came out in the wake of American Pie's success and added precisely nothing to the film-appreciating community, other than the question of why Damon agreed to do it.

Looking like possibly the least convincing skin-head ever, Damon pops up as cuckolding punk singer Donny who appears in the film earily to dedicate a song to "the nastiest, freakiest little sex puppet" he knows for their anniversary (and to brag of their affair in front of her recently dumped ex), showing off his multiple ear piercings and neck tattoo in the process. He then proceeds to serenade the collected party goers with a soft pop punk offering called "Scotty Doesn't Know" - or at least he mimes along badly to it anyway.

There's a good reason you probably missed this cameo, even though it is a fairly obvious one when you watch the film - Eurotrip was awful, the kind of God-awful recycled garbage that actually gave American Pie a bad name.