Mary J. Blige and Sam Smith perform "Stay With Me"
Pharrell Williams on stage in his custom Adidas Superstars
Madonna in Givenchy heels and Wolford tights.
Kanye West shows off his new song and new Yeezy 750 Boost shoes.
Ed Sheeran in Gucci sneakers
Gwen Stefani backstage in Louboutins before her performance with Adam Levine.