The band Sugarland currently has the number one album in America. How do you celebrate such a thing? Why, you appear on 'Chelsea Lately,' of course! But Sugarland has two members -- and one of the bandmates was conspicuously absent tonight (weeknights, 11PM ET on E!).

Singer Jennifer Nettles talked to Chelsea Handler about the album. But co-singer Kristian Bush wasn't there ... Hmm. Now why could that be?

To help you out a bit -- though the name "Kristian" is ambiguous, Mr. Bush is a guy. And he ran afoul of Ms. Handler during his previous appearance on the show. In fact, Handler apologized to Jennifer about it: "I probably offended him sexually, last time he was here." Whoops.

It wasn't so bad, though. The story behind the "offense" is that Chelsea and Jennifer engaged in some "explicit" girl-talk, last time Sugarland showed up. Although where Ms. Handler is concerned, things can get very explicit, very quickly.

Speaking of which, Jennifer mentioned trying out some "rapping" on the new album: "Apparently now I'm a 'rapper,' which I know ... you like." "... I don't know why you're looking at me when you say that " Chelsea replied. It was yet another reference to Chelsea's possibly sexy relationship with rapper 50 Cent -- which Handler steadfastly refuses to discuss. So maybe the host isn't always explicit about everything.