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 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 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 plus the Teen Choice Awards winners list!