Its been 27 years since former President Ronald Reagan signed the bill officially acknowledging Dr. Martin Luther King Jr.'s birthday as a national holiday. A day cemented to honor the life and legacy of Dr. King and to encourage all Americans to volunteer for a better community.

Dr. King became the face of the Civil rights movement, advocating nonviolent sit-ins, marches, and peaceful demonstrations to rid society of racial injustice. Unfortunately, in 1968, Dr. King was assassinated at 39, despite his efforts to bring peace and order to the world. But before he passed away, Dr. King used his communication talents with his speeches and through song. Notably, as one of Dr. King's favorite, "Take my hand, Precious Lord," he was captivated and inspired by the performance of Mahalia Jackson.

Jackson would perform the song with him at demonstrations to inspire civil rights activists and followers as they sought to further their cause. Dr. King's last words were said to be a request for this song. Jackson performed the song at Dr. King's funeral. 

Though Dr. King passed away more than 50 years ago, artists continue to pay tribute to the slain activist through their music. From U2 to Young Jeezy, Stevie Wonder, and Public Enemy, here are six tribute songs to Dr. Martin Luther King Jr.