Originally released last year, "Paper Planes" is now scoring across multiple formats—rock, top 40 and dance —thanks to the song's placement in the trailer for rough-shod stoner comedy "Pineapple Express." It's certainly apt, since the British songwriter/producer/ singer/visual artist samples gunshots throughout the track, mentions weed and tells listeners, "Some I murder, some I let go." The song also makes mention of M.I.A.'s recurring visa problems, which prevented her from recording much of her last album in the United States, and serves as an arch commentary on immigration, backed by a Clash sample from "Straight to Hell." A simple pop song it's not, but its traction is a welcome change to radio's often homogenous playlists. The success of "Paper Planes" might also coax M.I.A. out of her recently announced retirement. —Cortney Harding