It's a new year, so some music people figured you need new stuff to listen to. M.I.A., hoping to start 2011 on a promising note after a disappointing 2010, released a new free mixtape that includes tracks she'd quietly released online before, like "Steppin' Up" and the Blaqstarr-produced "Let Me Hump You." The 19 tracks can be downloaded here. Rick Ross has a new free mixtape himself; it is called "Ashes to Ashes." The Decemberists' new album, "The King is Dead," won't be released until mid-January, but NPR is streaming the whole thing gratis at its website. The Daily Swarm think it's spotted a leaked new track by Justin Timberlake. It is called "Take You Down" (Update: leak debunked; singer is actually a Rasmus Thude). Lady Gaga has some new material out too; you'd think it was a song off her upcoming album judging from all the online hollering of her little monsters, but nope, turns out it's just a new picture of her butt, which most paparazzi can already draw from memory.