“Invisible,” a track from U2’s Danger Mouse-produced 13th studio LP, wasn’t expected to be revealed until a Super Bowl commercial tonight, but it looks like it’s available a little early. “Invisible” is not the first single from the new album, which is now targeted for a summer release according to USA Today, but “a sneak preview — to remind people we exist,” says Bono. Stream and/or download “Invisible (RED Edit Version)” below.

U2’s re-teamed with (RED) as well as Bank Of America to make “Invisible” a free download on iTunes from now until 11:59 PM tomorrow. Grab it here. Bank Of America will donate $1 for each download to the nonprofit, which seeks to fight AIDS, TB, and malaria in Africa.

UPDATE: Here’s that Super Bowl commercial, which serves as a preview of the song’s Mark Romanek-directed video…

And here’s a short behind-the-scenes clip in which Bono describe’s the track’s origins: “The early lyrics were set on a train coming into London for the first time. I remember sleeping in Euston station, being broke… coming out of the subway into the spring of 1979, being 18 years old, it was punk rock in London…”

Check out our ranking of U2 albums worst to best here.