If Hollywood were high school, Justin Bieber and Selena Gomez would win the superlative for "Cutest Couple," hands down. Sure, they're multi-platinum pop stars, but they're still just young and in love (18 and 19, respectively). Earlier this week, a fan zoomed in on Selena singing along to Justin's performance of "Be Alright" from backstage -- the same song he apparently wrote for her. It was such a sweet video -- and it's far from unusual for the pair. Click through our slideshow to see more "awww"-inducing Jelena moments.