Although the overwhelming majority of AC/DC's 2009 earnings came from touring international arenas and stadiums (it pulled in $41.4 million from concerts and ranked No. 4 on Billboard's 2009 tally of the top 25 highest-grossing tours), the Australian rockers also experienced consistent album sales from their catalog. Indeed, the group's highest-selling album was its 2008 Walmart exclusive, "Black Ice," which shifted 227,000 copies. But coming in at a close second was the classic "Back in Black," with 215,000 copies. In total, the group sold 1.1 million albums in 2009.