Adele's "21" has broken yet another sales record. Nielsen Soundscan is confirming to "Rolling Stone" that the British star's 2011 smash hit is now the first album in history to sell over three-million digital copies. The almost-three-year-old album saw strong sales in 2013, coming in at number 21 on the overall list topped by Justin Timberlake. Adele topped the best-selling list for two years in a row in 2011 and 2012, and remained relatively quiet last year, apart from an appearance at the Oscars. "Rolling Stone" notes that despite her absence from the music scene, "21" is expected to continue in its consistent sales. Adele is reportedly at work on a new album, details of which are being kept tightly under wraps.