American Idol's Simon Cowell has unveiled a new singing competition to debut in the U.K. called Star Duets, in which professional recording artists team with celebrities on duets. "We have lined up an incredible cast," Cowell says in a statement. "There may be a few raised eyebrows when we announce who we've got." Pair Kenny Chesney with Renée Zellweger on "Islands in the Stream," dude, and I'll hop the pond to see it.