"California Gurls" best selling single of the year in U.S.
"California Gurls," Perry's summer smash with Snoop Dogg, edged out Train's "Hey, Soul Sister" as the #1 song of 2010. But it was extremely close. "California Gurls" sold just 84K more copies during the year than Train's "little tune that could." "California Gurls" sold 4,398,000 copies during the year. Only two songs in digital history have ever sold more copies in a calendar year. Both were by the Black Eyed Peas; both came last year. I will update every number in my previous post on the year's top 20 songs today.