Watch Shawn Mendes and Camila Cabello Shred Their PCAs Performance

Shawn Mendes joined the gorgeous crop of hot guys at Wednesday night's People's Choice Awards in LA, and he's been having quite the night! Not only did he grace the winner's list and give an adorable acceptance speech, but he took the stage with his rumored girlfriend of three months, Fifth Harmony's Camila Cabello. Watch the video above to see the stellar new renditions of "Stitches" and "I Know What You Did Last Summer."