Grammy Concert: Justin Bieber Sings His 'Favorite Girl'hings

While Katy Perry chose to go loud in her opening set, Justin Bieber prefered to have his performance stripped-down at the recent Grammy nominations concert aired December 1. Wearing casual black T-shirt, gray jeans and purple cap, the Canadian singer strummed his guitar and delivered his "Favorite Girl". Justin Bieber is one of the artists who gets more than one nomination. He is battling