Pounding your stake, expanding your telescope, sharpening your fang, clamping your test tube...whatever metaphor you want to use, we have one question for you, and one question only:

From our B-Cup Beauties division, Underworld's Kate Beckinsale Vs. The Big Bang Theory's Kaley Cuoco...who's hotter?

Kate Beckinsale

  • Starred in all three Underworld films, but only got nude in the second SKINstallment, Underworld: Evolution (2006)
  • Named Esquire's Sexiest Women Alive in 2009
  • Made granny panties look sexy (and that's no small feat) with her topless art-appreciation scene in Uncovered (1994)

Kaley Cuoco

  • Fulfilled the fantasy of every nerd- hooking up with the hot girl across the hall- when she dated experimental physicist Leonard on The Big Bang Theory
  • Posed nude (although she covered up the good parts) for Allure's annual "The Naked Truth" feature in 2011
  • Though she was still jailbait at the time, 15-year-old Kaley made guys sigh "Marcia, Marcia, Marcia" when she appeared in her bikini in Growing Up Brady

SKIN CENTRAL'S PREDICTION: We've never seen Kaley Cuoco nude in a scene, but she did easily beat hot sitcom star Zooey Deschanel in the first round; however, Kate has also been performing very strongly against her opponents, has done nudity, AND is in the public eye for her role in the Total Recall remake. Kate Beckinsale for the win.

For more hot stars going head-to-head in heated compe-TIT-ion, check out Mr. Skin's Whack-It Bracket now...voting is FREE, and every vote enters you to WIN an iPad and other awesome prizes!