Since I know you’ve all been dutiful PopWatchers, keeping up with your Must List voting, it’s time to move on to the next (and most cuddly) category: What is the Must on-screen couple of the summer? It’s hard to believe that it has been five years since Ryan Gosling and Rachel McAdams won us over with their summer sleeper The Notebook, but they just might be dethroned by 2009’s sweethearts. Who will have our hearts aflutter this summer? Could it be the indie love pairings of John Krasinski and Maya Rudolph in Sam Mendes’ Away We Go? Joseph Gordon-Levitt and Zooey Deschanel in (500) Days of Summer? Real-life couple Michael Cera and Charlyne Yi’s psuedo-documentary Paper Heart? Or will the sex appeal of The Proposal‘s Ryan Reynolds and Sandra Bullock or The Ugly Truth‘s Katherine Heigl and Gerard Butler make you go all googly-eyed instead? Vote below and let us know!