Shawn Mendes hit the stage at the Teen Choice Awards in LA on Sunday, smiling big as he accepted the award for choice web star. The 17-year-old singer took to Twitter to thank his dedicated fans [1] soon after he won his award, saying, "YOU GUYS ARE THE BEST FANS THANK YOU SO SO SO SO SO MUCH!! I OWE IT TO YOU I LOVE YOU." The award show marked the latest in a series of exciting events for Shawn, who's been busy touring with none other than Taylor Swift [2] this Summer. Keep reading to see the best pictures of Shawn Mendes at the Teen Choice Awards, then check out all the celebrities on the red carpet [3] plus the Teen Choice Awards winners list [4]!