Conan O'Brien may have had a few brief moments (okay, a year) as 'Tonight Show' host before the role was taken back from him by the so-called retired Jay Leno, but that didn't stop him from being happy for fellow late-nighter Jimmy Fallon, who was announced as Leno's replacement yesterday (April 3).

This of course was not the case on 'Chelsea Lately,' where he and Chelsea Handler get in a naked shower fight over the fact that she's in his old studio. So much for letting fake bygones be fake bygones.

The second video is much less work appropriate and features a naked yet strategically blurred O'Brien and Handler griping over parking spaces, water pressure, whether or not Chelsea is really a man and ending up in a slap fight (because apparently the one Chelsea had with Sandra Bullock didn't teach her a thing).

Be on the lookout for a dig at Joan Rivers, who may or may not be the first woman of late night -- because as Conan puts it, "I'm still convinced whatever that is, it's female."

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