Taylor Swift hit another milestone having now sold over 20 million albums. Here are the details Big Machine put out:

Taylor has sold 10 million albums in the last 18 months – she reached the 10 Million albums sold mark in September of 2009. Big Machine Records and Universal Music International executives presented Taylor with a plaque commemorating the achievement at a special backstage event at a sold-out show at London’s O2 Arena this week.

The 20 million number represents actual full albums sold – in addition, Taylor has sold over 33 million paid song downloads, making her the top-selling digital artist in music history.

20 Million + is the worldwide combined sales total for her three Big Machine Records studio albums: Taylor Swift (released in 2006), Fearless (2008), and Speak Now (October, 2010), plus The Taylor Swift Holiday Collection and Beautiful Eyes (a Walmart-only release).Taylor has earned Gold, Platinum and Multi-Platinum album sales certifications in 18 countries spanning 5 continents.

Taylor’s 20 million + albums sold include the following:
Taylor Swift 5,534,805 units US & International
Fearless 8,681,753 units US & International
Speak Now 4,850,246 units US & International
The Taylor Swift Holiday Collection 788,353 units US
Beautiful Eyes 257,047 units US

source:antimusic