We've reached a new round here at the Mr. Skin Whack-It Bracket, and while we only got it half-right (How about that Emmy Rossum upset in the Chesty C-Cups division?!) in our last round of predictions, that only makes it more fun.

We've reached the Sexy 16, and now that the competition is heating up we're narrowing the voting window, so be sure to VOTE before Sunday, March 25 when we move on to our Enticing 8.

And to kick off this battle of the TIT-ans, we've got two viewer favorites from our A-Cup All Stars division: It's Natalie Portman Vs. Kristen Bell!

Natalie Portman

  • After speaking out against onscreen nudity early in her career, she pulled down her pants for a bare-butt scene in Hotel Chevalier (2007)
  • Made out with Mila Kunis in Black Swan (2010)- and if that doesn't turn you on, you're on the wrong website
  • Donned a wig and a thong for a nip-slip-filled role as a stripper in Closer (2004)

Kristen Bell
  • Still inspires insane levels of devotion from fans of her girl-detective series Veronica Mars
  • Says she'll never do an onscreen nude scene, though she did slip a nip in Spartan (2004)
  • Brought her sexiness levels to new heights with a seductive lingerie dance on Showtime's House of Lies

SKIN CENTRAL'S PREDICTION: Both of these ladies have legions of fans, handily (heh) beating the competition in our first two rounds, so this is one of our toughest calls yet. Neither has an outstanding skin resume to fall back on, but Kristen's been all over the place lately thanks to House of Lies while Natalie's stayed out of the spotlight after the birth of her son. Kristen Bell for the win.

Check out the rest of our Sexy 16 on our Whack-It Bracket page here at MrSkin.com