Pharrell Williams praises Ed Sheeran

London:`Happy` singer Pharrell Williams has spoken out in praise of fellow singer Ed Sheeran.Williams described the `Lego House` singer as a pleasure to work with, after they collaborated on Sheeran`s current single `Sing`, reportedly. "I think that he is an anomaly, he`s not easily describable, in the sense that he`s not normal," Williams said. Williams added: "Sheeran is different, he thinks about things different. He has a different perspective. It`s a pleasure to work with him because I`m able to work with a different type of human being, who just sees things differently, and I`m able to learn and sponge things from him too." The pair were both performers at the recent radio`s `Big Weekend`.