From Pete Seeger to Billie Holiday to Rage Against the Machine to Kendrick Lamar, musicians of all genres have spoken truth to power ...

But for a walk down memory lane, Stacker analyzed Billboard’s Greatest of All-Time ... Hot 100, where it peaked at #25.

Billboard ranked the Top Hot 100 Songs of the 21st Century ... What’s your favorite song of all time? Let us know in the comments! Whoopi Goldberg defends Carrie Underwood's decision to sing ...