Jennifer Aniston to shove '30 Rock' in John Mayer's face

Jenan Nothing like a well-timed rebound.

Instead of drifting into the arms of a new man, newly single Jennifer Aniston might be seeking the girl power magic of one Tina Fey. E! Online reports that the actress could return to NBC this fall in an episode of workplace comedy "30 Rock."

"She is shooting now," a source tells E! "We are not giving any specifics on her character."

This news gives us faith that Jen's finally developing good taste. "30 Rock" is the smartest comedy on TV, better than her last movie, "The Break-Up," and certainly better than John Mayer, who recently spouted this bit of gobbledygook to gathered press members in defense of Aniston:

"If you guys are going to run stuff and run every lie under the sun, have somebody stand up for somebody. Have me as a man who ended a relationship stand here and write some truth. Have me stand up for somebody and write that Jennifer Aniston is the smartest, most sophisticated person I think I've ever met.... I don't do 'the taper.' I guarantee you [that] 20 percent of the people on this street right now who are in a relationship wish they could get out but they don't know how. And I'm going to be honest on the way into my relationships and I'm going to be honest on the way out of my relationships."

Thanks, John, but no thanks.

Aniston's appearance would follow the very funny role of her "Friends" alumni David Schwimmer, who played NBC's arrogant environmental mascot Greenzo last season.

It might even finally win her some Emmy love: This year, "30 Rock" is up for seven guest-acting nominations, including ones for Rip Torn, Will Arnett, Steve Buscemi, Tim Conway, Carrie Fisher, Edie Falco and Elaine Stritch.

-- Denise Martin