Can soda pop cans (pun intended) go bad?

I just tried the Mountain Dew throwback "made with real sugar" and really like it a lot! On the outside of the box (getting it in aluminum cans) it says it's best by June 2010, but how long past that would+could it be drinkable assuming I keep it out of sunlight?
Update: mi - That's the great thing about this MD throwback, it uses real sugar instead of HCFS, will keep Mexico as an option though - especially as I am less than 20 miles away.
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