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.

Would you ever take relationship tips from Justin and Selena? Which moment do you think is their cutest -- or most cringe-worthy? Sound off in the comments below or tweet @HuffPostTeen!

Loading Slideshow...
  • Selena sings along to Justin backstage

    During Justin's performance of "Be Alright," a fan caught<a href="http://www.cambio.com/2012/06/20/selena-gomez-watch-sel-sing-along-to-justin-bieber-be-alright/ " target="_hplink"> Selena singing the lyrics from backstage </a>on video. To make the moment even sweeter, Justin wrote the song specifically for her!

  • Date Night

    "If I'll share anything with you, it's that he is a hopeless romantic," <a href="http://www.huffingtonpost.com/2012/06/07/selena-gomez-justin-bieber-hopeless-romantic-elle-cover_n_1578993.html" target="_hplink">Selena told <em>Elle</em>. </a>"I had just mentioned it in the car -- all I said is that I really want to see <em>Titanic</em> again, and then..." Just a few days later,<a href="http://www.tmz.com/2011/09/23/justin-bieber-selena-gomez-staples-center-titanic-screening-romantic-date-mr-deeds-demi-lovato-concert/" target="_hplink"> Justin rented out the entire L.A. Staples Center</a> for a private screening of the movie just for them!

  • Date Night: Helicopter Ride!

    Not one to skimp on romantic gestures, Justin <a href="http://www.people.com/people/article/0,,20604852,00.html" target="_hplink">rented a helicopter </a>for date night! The couple flew over waterfalls and to Stratford, Ontario in between rehearsals for the MMVAs.

  • Justin and Selena With Siblings At The MMVAs

    Justin and Selena may have arrived at the MMVAs separately, but they each brought an adorable guest --<a href="http://www.hollywoodlife.com/2012/06/18/justin-bieber-muchmusic-awards-half-brother-jaxon-pic/" target="_hplink"> one of Justin's baby siblings</a>! Watch Selena carry Jazzy Bieber down the red carpet.

  • Caught On Kiss Cam

    The cute couple was caught on the kiss cam at a Lakers game. While Selena looked a little embarrassed to be in the spotlight, Justin went in for the kiss.

  • "Call Me Maybe"

    Although Justin and Selena may be two of the world's biggest pop stars, that doesn't stop them from acting like your average teens every once in awhile. Here, they're singing along to "Call Me Maybe" with their friends, including fellow star Ashley Tisdale.

  • Vacation in Hawaii

    Justin and Selena took a break from their busy schedules for a three-day trip to Hawaii. One dedicated fan put together a photo montage of their vacation, filled with sweet snaps of the couple kissing in the water, trying out the island's restaurants, and riding jet skis.

  • 2011 American Music Awards

    With just the right dose of Hollywood glamour, Justin and Selena made a stunning couple on the red carpet at the 2011 American Music Awards.

  • Their First Kiss

    Aww, <a href="http://www.abc2news.com/dpp/entertainment/celebrity/Justin-Bieber-keeps-romance-hidden-for-sake-of-fans_28880018" target="_hplink">Justin describes</a> their first kiss! "My first kiss with Selena was the best of my life. It was in the car. It was scary and spontaneous and it was just awesome," he recalled. "What does love feel like? It feels good. If you're really in love, then you should get butterflies -- butterflies and happiness. That's how I feel anyway."

  • Justin Serenades Selena!

    A year before they went public with their relationship, Justin serenaded Selena with "One Less Lonely Girl" in New York on New Year's Eve. Their obvious chemistry should have tipped us off that they would soon be an item! Correction: An earlier version of this article stated that this video was filmed just days before Justin Bieber and Selena Gomez went public with their relationship, not a year before.