The Insider.com

30 Rock has never suffered in the celebrity cameo department (hello, Oprah!), but on last night's episode, Tina Fey's series cranked things up a notch by enlisting an army of A-listers!

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Watch Sh*t Liz Lemon Says

Liam Neeson! Amy Adams! Hugh Grant! Vince Vaughn! Kristen Bell! John Krasinski! Jenna Maroney! Wait, what?

In a fun spoof of those star-studded rom-coms America can't get enough of (Valentine's Day, New Year's Eve) 30 Rock debuted the world trailer for Martin Luther King Day: The Movie -- and actually got Emma Stone to star in the silly spot.

Emma Stone Needs No Fashion Help

Although you just know some suit in Hollywood is all, "You know, that's actually not a bad idea." To him I say, "Yes it is." However, you've gotta love the movie's tagline!