Michael Jackson had planned a 50-show comeback in London in the summer of 2009. Thanks to Dr. Conrad Murray, he never got a chance to perform. Just the same, his untimely death made the King of Pop as popular as ever. He ranked as the top-selling artist of 2009 with 8.2 million albums sold. According to Nielsen SoundScan, that's nearly double No. 2 finisher, Taylor Swift, who at least beat all living musicians with a huge 4.6 million sold. Jackson died June 25, just weeks before he was to return to the stage. His rehearsal footage has been made into a double CD and film, This Is It. Michael Jackson dominated 2009 music sales after passing away....