Funk gods deliver "Get Down on it," "Jungle Boogie," "Hollywood Swinging," "Ladies' Night" and, of course, "Celebration"

The Rock & Roll Hall of Fame class included Mary J. Blige, Foreigner, the late Jimmy Buffett and A Tribe Called Quest, among others.

Sammy Hagar was on hand to induct the band Foreigner. Kelly Clarkson joined in for a performance of the band’s 1984 hit “ I Want to Know What Love Is ,” and Demi Lovato, Slash and drummer Chad Smith from the Red Hot Chili Peppers played “ Feels Like the First Time ” (1977).