Shawn Mendes's Illuminate tour is in full swing, and fans who saw him perform at Brooklyn's Barclays Center Wednesday night (August 16) got an extra-special surprise: Ed Sheeran joining your boy onstage! They played "Mercy" together, but you can barely hear their voices over the screaming crowd. If you were lucky enough to see this awesomeness in person, you'd probably be screaming, too.
"Castle On The Hill" is also up for Best Cinematography, and Sheeran himself will face off against Bruno Mars, Kendrick Lamar, Ariana Grande, The Weeknd, and Lorde for Artist of the Year. It's unclear exactly how so much talent will fit on one stage, but expect some out-of-this-world shenanigans.