Hayden Panettiere showed up at the Late Show With David Letterman yesterday in a hot little black number. What do you think of the semi-revealing lace dress? See more photos after the jump...

Image © Janet Mayer / PR Photos

The Heroes star recently admitted she can be insecure sometimes. She admits, "The older I get the more comfortable I get with it, but I still have my days where I don't feel great, and I don't like this outfit or that outfit and I'm having my fat day where I have to put something baggy on and sweatpants or just with the way that people perceive me, I have plenty of insecurities I can go on and on."

Image © Janet Mayer / PR Photos

Hayden is currently single but is "mingling." She just broke up with U.K. TV presenter Steve Jones because she doesn't want a long distance relationship.

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