If you have checked out the top ten songs on iTunes recently, you will notice "Paper Planes" by MIA in the #2 position. Didn't her cd Kala come out a year ago?
Thanks to heavy plays during the trailer of Pineapple Express, the song and album have resurfaced again. Although, I saw an advanced screening of Pineapple Express last week and Paper Planes was nowhere to be found in the movie. Interesting. It also helps that the song is probably the catchiest pop song of 2007.
This reminds me of several artists who have been given a boost thanks to commercials. If your song is in an Apple commercial you are pretty much guaranteed a spotlight. Yael Naim and The Ting Tings are probably the most recent artists launched by Apple (Coldplay doesn't count since they are already huge).