Performers used to complain about the power of radio stations, which would determine, sometimes quite corruptly, which singles to put heavy rotation; then MTV, where a favored music video could make a hit; now it's the turn of iTunes to take the unpopular role of the Man. A pop sensation from Britain has accused Apple of "bullying" tactics in demanding exclusive tracks for the Cupertino company's hugely popular online music store. Lily Allen, the young singer whose rocketed to stardom with songs such as Smile and LDN, says: "They won't advertise your album unless you give them extra material." Nobody is accusing Apple of traditional payola. The concessions it squeezes, from performers and their record labels, benefit consumers foremost, and Apple only in so far as the company cements their loyalty. But it's an early indication that Apple in music, like Google in news, or eBay in the antique market, will become a bogeyman. For more, check out the Wall Street Journal's feature on the power of iTunes, Music's New Gatekeeper.