Off-Key Chris Klein Auditions for ‘Mamma Mia!’ (Video)

So that's why he didn't get the part!

Here's footage purportedly showing Chris Klein auditioning for the love interest role in "Mamma Mia!"

It could be a spoof, but if the "American Pie" star really is such an off-key train wreck, it's no surprise the producers went with Dominic Cooper to play Amanda Seyfried's beau. Then again, they did cast Pierce Brosnan in a singing heavy part. Have a listen to his version of "S.O.S." and you'll see why the Irish actor isn't much better than poor Klein.

 Video Below: