For one day only, U2 is giving away its latest song for free on iTunes. "Invisible" was featured in a Super Bowl commercial that also welcomed Bank of America to the Red HIV/AIDS charity — a cause close to Bono's heart. For every download of the track, Bank of America will donate $1 to Red and the fight against AIDS. The song will be available for free until 11:59PM EST on Monday. U2's next album — the band's first since 2009's No Line on The Horizon — is expected to see release this spring. Bono recently told USA Today that "Invisible" is not intended to be the first single from that album. Instead, he said it's "sort of a sneak preview — to remind people we exist." The song can be downloaded by following this link.