The World's Best-Selling Beer?

Quick.  Name the beer you think is the biggest-selling beer brand/label in the world.

Budweiser?  Bud Light?  (Gee prove the U.S.'s ethnocentrism once again.)

Guinness?  Carlsberg?  Heiniken? 

Ah, forgot about China.......  Tsingtao?

According to this article from Britain's Telegraph, the world's best-selling beer is a brand that (as far as I know) isn't available in Maryland or D.C., not even at Max's Taphouse or The Bier Baron; is partially owned by SABMillerCoors; and is (to read some reviews) nothing you need to bother with seeking out.