Kristen Stewart said her Yellow Handkerchief co-star Eddie Redmayne was a better kisser than Rob! Should she be worried that he might prefer locking lips with the sultry ScarJo?

Uh-oh Kristen Stewart, watch out! Your BF, Robert Pattinson, is the frontrunner to play legendary Nirvana lead singer Kurt Cobain in movie about his life, and Scarlett Johansson is allegedly in talks to play Kurt’s leading lady, Courtney Love. ScarJo is a total femme fatale – we’d be worried if we were in your shoes!

Rob is desperately trying to get a hold of Courtney, Kurt’s real-life widow, in a bid to score the part. “Robert has been calling and emailing her non-stop. [Courtney] has been a bit wound up by his manners, but he is her number one choice to play Kurt,” reported The Sun April 9.

Courtney reportedly wants Scarlett, 25, to portray her in the David Fincher-directed film (which has the working title of All Apologies) – which would mean that Rob, 23, would have one majorly HOT co-star! But if R-Patz were to enjoy kissing his potential new leading lady, it might serve K-Stew right. Why? The 20-year-old DID say that she preferred kissing her Yellow Handkerchief co-star, Eddie Redmayne, to Rob! Ouch!

At the end of the day, we’re pretty sure Rob is still going to prefer Kristen to Scarlett. First of all, ScarJo is married to hottie Ryan Reynolds. Secondly, R-Patz and K-Stew have so much in common! After all, she already portrayed a rock icon on the big screen – Joan Jett in The Runaways. They’re already what we’d like to call ‘a musical match made in heaven.’ How could Scarlett possibly compete?

Do you think Kristen Stewart should be worried that her BF Robert Pattinson might enjoy kissing Scarlett Johansson a little TOO much?

– Allison McNamara