Kristen Stewart got to lock lips with both Taylor Lautner and Robert Pattinson in "The Twilight Saga: Eclipse," and it seems like all the — cough, cough — hard work paid off: Both smooches are up for Best Kiss at Sunday's 2011 MTV Movie Awards.

We went straight to Stewart's fellow celebs to ask: Which lip-lock should come out on top?

"Vampire Diaries" star Kat Graham knows a thing or two about hot supernatural guys, and she has a very strong opinion about which kiss rules in "Eclipse": "I love Taylor Lautner," she gushed. "He could be making out with a hamburger, and I would be like, 'Best kiss ever!' "

Olympian Johnny Weir also seems to be a member of Team Jacob. "Taylor Lautner in that movie was, you know, rocking the sex," he exclaimed, most likely referencing Lautner's ever-present abs in the franchise.

"X-Men: First Class" actress Rose Byrne is leaning toward Team Edward when it comes to the kisses, even calling out Pattinson's fan-favorite nickname: "I think it will be RPattz."

Elle Fanning, whose sister Dakota stars in the "Twilight" flicks, concurred with Byrne, reasoning that Stewart's Bella is "marrying Edward, so you sort of have to pick Edward."

"X-Men" hottie Michael Fassbender might not know Edward from Jacob, but he did pick one of the actors over the other. "I'm just going to go with Robert," he said.

Hilary Duff kept it right in the middle with her choice. "You're really going for all the tough questions, aren't you?" she teased. "In the first movie, it was better with Edward, and I think [then] it was better with Jacob," she said. "Was that politically correct?"

Stewart's "Eclipse" kisses are up against Ellen Page and Joseph Gordon-Levitt ("Inception"), Emma Watson and Daniel Radcliffe ("Harry Potter and the Deathly Hallows, Part 1") and Natalie Portman and Mila Kunis ("Black Swan"). Hosted by Jason Sudeikis, the 20th annual MTV Movie Awards air live this Sunday at 9 p.m. ET from the Gibson Amphitheatre in Universal City, California.

Will wizards, vampires or dream thieves steal the 2011 MTV Movie Awards? Find out June 5, when the 20th annual show airs live at 9 p.m. ET/PT. Tune in at 7:30 p.m. ET/PT that night for the "America's Best Dance Crew" finale and Movie Awards pre-show, loaded with live action from the red carpet, exclusive movie clips and a special edition of "After Hours." To get into the magical movie mood, it's Sneak Peek Week — five days of exclusives and interviews with the casts of "Fright Night," "Horrible Bosses" and more. Check out everything there is to know about Sneak Peek Week, the Movie Awards and the pre-show at MovieAwards.MTV.com!