http://www.billboard.com/column/char...05379792.story
After combing through Nielsen SoundScan's archives, here is a look at the artists (including lead and featured billings) who have tallied the most million-selling downloaded songs in the digital era:
Total million-selling downloads, artist, top-seller (in millions)
24, Lil Wayne, "Lollipop" (4.3)
19, Rihanna, "Love the Way You Lie" (5.1)
17, Eminem, "Love the Way You Lie" (5.1)
15, T-Pain, "Low" (6)
14, Taylor Swift, "Love Story" (5.1)
12, the Black Eyed Peas, "I Gotta Feeling" (7.5, the all-time best-selling download)
10, Britney Spears, "Womanizer" (3.2)
9, Beyonce, "Single Ladies (Put a Ring on It)" (4.7)
9, Kelly Clarkson, "My Life Would Suck Without You" (2.5)
9, Ke$ha, "TiK ToK" (6)
9, Lady Gaga, "Poker Face" (6.4)
9, Ludacris, "Break Your Heart" (3.5)