Earlier this week, we outlined the 10 types of television cameos. Right on cue, here's Sheryl Crow gracing us with a guest spot on Cougar Town. Video inside.

The cameo is one of television's oldest tricks to drum-up interest for a show. But not all cameos are created equal. Inside, a list of the kinds of cameos, why they exist, and just how effective they are.

CSI had a little bit o' country twang to it last night. An intertwined thriller involving Rascal Flatts' bassist being afflicted with amnesia after his guitar attacked him. Also a canoe? And German diplomats? Whatever, Rascall Flatts are terrible actors.

From heroin addicted chef, to globetrotting professional eater, to...this? Anthony Bourdain will make an appearance as a doctor on the Nickelodeon kid's show set to debut March 10th. Bourdain fans should not be pleased. Yo Gabba Gabba fans, either.

Did you watch last night's episode carefully? In the opening scene Larry David was trying on some pants. When the fire alarm goes off, the building must be evacuated. One of the evacuees? None other than Ben Affleck.

CSI: Diddy. CBS announced today that Sean Combs has agreed to a two-episode guest-starring stint on CSI: Miami, in which the versatile rapper/mogul/actor "will portray a prosecutor who doesn't get along with police Lt. Horatio Caine, played by David Caruso." Little else was disclosed about his appearance beyond a note that Diddy's episodes will air in mid-winter before his character is vanquished in short order in a dramatic, best-of-five, shades-shedding duel with Caruso. [AP]

We weren't even going to mention Brett Ratner's appearance on Sunday night's episode of Entourage, so disappointed were we that the lovable, attention-craving fauxteur was unable to live up to the standard of hacky-director-cameo excellence set by Crash's Paul Haggis last season. But today's Gatecrasher column notes that Ratner's gently self-satirizing turn accurately mimics his real-life shoot etiquette (we can't recall the exact wording of his most notable line, but we remember it involved the appreciation of a model's ass), forcing us to revisit our letdown: