Jennifer Aniston's had a pretty big week, what with that Vogue cover [1] and interview with her comments about Brad Pitt and Angelina Jolie. It's good timing, then, that she heads to 30 Rock [2] tonight as the latest in that show's long list of high-profile guest stars.

Aniston, back on TV for the first time since her quick appearance on Dirt [3], plays Claire Harper, a Fatal Attraction-esque stalker who randomly turns up in New York and takes quite a shine to Jack. Liz tries to warn Jack about Claire's freakish ways, but that doesn't stop Claire from serenading Jack with a Marilyn Monroe-style rendition of "Happy Birthday" to him (and it's not even his birthday!) and going a little crazy in his house.

Aniston's not the only guest star on tonight's episode; for some reason, the cast of Night Court is also around. Much as I love a good Markie Post [4] sighting, though, it's Aniston whom I can't wait to see. Can the episode possibly live up to last week's Oprah-filled gem [5]? To watch a couple of clips, just .

Photo courtesy of NBC [6]