17. "Walk On"
Inspired by the plight of Burmese political prisoner Aung San Suu Kyi, "Walk On" is about the strength it takes to make a great sacrifice for a just cause. A section from the song's spoken-word intro gave U2 the title for one of their most inspirational albums: "And love is not the easy thing/The only baggage you can bring/Is all that you can't leave behind." "It is a mantra, really, a bonfire of the vanities," Bono said. "Whatever it is you want more than love, it has to go." Aided by a soaring guitar melody (one of the Edge's best of the 2000s), "Walk On" charted all over the world and won a Grammy for Record of the Year. Live, it became a nightly tribute to Aung San Suu Kyi, who was released in 2010.