"Office" star John Krasinski and full-frontal nudist Jason Segel HILARIOUSLY crashed a random girl's bachelorette party last weekend -- and we got the sex doll-filled karaoke footage!!!
it all went down at a bar in Ann Arbor, Michigan -- we're told John and Jason were hanging out with Emily Blunt and "Community" actress Alison Brie ... when the girls at a nearby bachelorette party asked the guys to sing for them.
John and Jason happily obliged -- with a pretty awesome rendition of "Brown Eyed Girl" -- and we're told, the bride-to-be couldn't have been happier.
Source: http://www.tmz.com/2011/06/21/john-krasinski-and-jason-segal-bachelorette-party-karaoke/
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