i probably wouldn't put madonna or celine up for debate for the best male pop singer. i don't care what the 16 year old has to say about the question... plenty of other suggestions in this thread too. the Gibb brothers, MJ, Billy Joel, Bowie, George Michael, Elton John... and unrelated to thorgnor's post, but if a singer sings a pop song, are they not a pop singer for that performance?