01/09/2011 08:50 am ET | Updated May 25, 2011

Mila Kunis On Kissing Justin Timberlake, Natalie Portman: Who Is Best?

Mila Kunis made major buzz for her passionate 'Black Swan' sex scene with Natalie Portman, but was her ballet co-star her best on-screen kiss?

Kunis covers the new issue of Cosmopolitan, and, among other things, opens up about kissing her big co-stars. For her next film, 'Friends With Benefits,' she's set to swap spit with Justin Timberlake, and of course, she played Ashton Kutcher's girlfriend for years in 'That 70's Show.' Add in James Franco and Jason Segel, and she's got a lot to lips to choose from.

So, with all those choices, who would she take? She's being selfish and choosing all of them.

'Justin's upper lip,' Kunis says. 'Natalie's bottom lip... Ashton's stubble... James's chin... and Jason's teeth," she told the magazine (via The Daily Mirror).

Okay, fine, but what attracts her to a guy in real life?

"Confidence, not cockiness," Kunis said. "Knowing who you are is confidence. Cockiness is knowing who you are and pushing it down everyone's throat... "Looks go; they fade. I don't think looks matter."

Now that she's broken up with long-time boyfriend Macaulay Culkin, guys better take note.

For more, click over to The Daily Mirror.