Alicia Keys opened up the vault, which is also the name of her website, to do her part in honoring Martin Luther King, Jr. on his day by providing fans with an unreleased song that was recorded in 2007. According to Keys twitter, “This is a song about POWER that I wrote back in 2007 that I have never shared w/ my fam until now…”

Check out “Power” after the jump…

[via MissInfo]