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By Ree Hines

Sure, parties are fun, but for one man, the real fun starts after the celebration's over.

A viral video that's raked in almost 4 million hits on YouTube showcases one heck of a morning-after song-and-dance routine.

Talk about dancing like no one's watching!

While the underwear-clad guy mops up — and more important, gets his groove on to Sheena Easton's 1980 hit, "Morning Train" — after a Halloween party, his roommate films it all.


In the end, the tidy dancer balks, the roommate laughs and even their dogs get in on the fun.

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