A new musical collaboration between rockers Eddie Vedder and Michael Stipe has leaked online.
"It Happened Today," which features on R.E.M.'s new album, leaked on Monday night.
Pearl Jam star Vedder has long been associated with Stipe and R.E.M. - he often appears onstage at concerts and he inducted the band into the Rock and Roll Hall of Fame in 2007.
R.E.M.'s Collapse Into Now is set for release in March.
Neither Vedder, Stipe nor R.E.M. have commented about the Internet leak.