What I think is most shocking about this list is that Michael Jackson still managed to sell 1.4 million albums. For all the flack he gets in the media and much of it well deserved, he still is a viable brand and is still making a bunch of people money. Who woulda thunk?

Close but no cigar for Lil Wayne, he came in a close second for combined record sales in 2008.
via Hitsdailydouble Top 20 Artists of 2008 by Combined Sales of All Releases (in Millions of Units):
1. AC/DC 3.4 2.
Lil Wayne 3.3
3. Taylor Swift 3.2
4. Coldplay 2.5
5. Metallica 2.3
6. Kid Rock 2.2
7. Jonas Brothers 2.1
8. Sugarland 1.9
9. Jack Johnson 1.8
10. Mariah Carey 1.7
11. T.I. 1.6
12. Nickelback 1.5
13. Beyonce 1.4
14. Kenny Chesney 1.4
15. Michael Jackson 1.4
16. Elvis Presley 1.4
17. Beatles 1.4
18. Josh Groban 1.3
19. Journey 1.3
20. Leona Lewis 1.3