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It's been a busy week for Defamer PartyWatcher Ann: Having barely recovered from Saturday night's Guitar Hero III launch festivities in which she got a little carried away and set her controller ablaze in a Hendrix-channeling moment, she managed to pull it together in time to check out Monday night's celebrations in honor of the 100th episode of Family Guy. Accompanied by photographer Maggie Serrano, the two were warmly welcomed by the various Seths in attendance. Her report, and another one of those fun photo galleries, follow after the jump.

We managed to have a hell of a time at Monday night's Family Guy 100th Episode Party at Social in Hollywood, catching Seth McFarlane croon classics like "I Get A Kick Out of You" and "I've Got You Under My Skin" over a live band, and Seth Green fending off various lusty ladies. Supporting engineers and animators also happened to provide us with anonymous tidbits of insider information, such as the fact that this party was waaaaay better than the cheapo Simpsons parties. That, and the fact that Stewie may be hiding a severe methamphetamine addiction.