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What happens when the two great tastes of Dominic Monaghan and Zachary Levi come together?

You can't keep a certain Lost-and-Chuck-lovin' TV diva away.

In the latest episode of the Watch With Kristin show (above), I hit the set of Chuck as Dom guest stars as a rock star. And yes, he is coming at you in 3-D! The episode airs tonight on NBC.

Speaking of crossovers, Friday Night Lights star Aimee Teegarden debuts on 90210 this week, and she's joining Dustin Milligan to give you the lowdown on the accident and whether Annie (Shenae Grimes) and Ethan are on the outs.

Also, more news on the Arrested Development front, and Omar Epps weighs in on whether Thirteen (Olivia Wilde) will be killed off House.

Plus, for a sneak peek of tonight's episode of Chuck, check out the clips below...

Watch the latest full episodes of Chuck here.