which of taylor swift's albums won the grammy award for album of the year in 2010?

Taylor Swift's album that won the Grammy Award for Album of the Year in 2010 was "Fearless." She won this award at the 52nd Annual Grammy Awards held on January 31, 2010, becoming the youngest artist at the time to receive this honor at age 20. "Fearless" is her second studio album, released in 2008, and it was critically acclaimed, as well as the best-selling album of 2009. The album also won Best Country Album along with Album of the Year at the same Grammy Awards ceremony.