Mom-to-be Kim Kardashian may be solid with main man Kanye West, but technically, she's still married to Kris Humphries. During a Thursday night visit to "Late Show," David Letterman wanted to learn more about that sticky situation.

"When you gonna wrap that up?" the not-so-tactful host asked.

"Well, I'm trying," Kim insisted. "It's a process, and I've been trying for almost two years now to wrap it up. But it's ... you know ... it's hard...

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