After years out of the spotlight, rock legend David Bowie has marked his 66th birthday with the release of his first new song in a decade. The ballad "Where Are We Now?" will be followed by a new album, The Next Day, in March, the BBC reports. Bowie, whose last album was 2003's Reality, has not performed live since 2006 and the new single has prompted a flurry of speculation about a possible 2013 tour. (More David Bowie stories.)