Good grief, I haven't even heard of some of these people. Flo Rida? Ke$ha? Barbara Streisand I believe, she was enormously popular. And I don't think Bob Marley has ever sold many albums though he is highly respected.

How much of this is due to Soundscan and the way we keep track now as opposed to the more sloppy rip-off-the-artist bookkeeping in the past?