Maroon 5/Lee Brice

The pop/rock juggernaut that is Maroon 5 launched some 20 years ago in Los Angeles. Formed out out of the ashes of alternative rock act Kara's Flowers, the band quickly topped the charts with "Harder to Breathe," a song that successfully straddled the rock/pop line. Lead singer Adam Levine's career now eclipses that of the band. A coach on NBC's reality talent show The Voice, he's become a celebrity-at-large and carries himself with the kind of pretentious that comes with the turf. Expect him to display his "moves like Jagger" at tonight's show, part of the Concert for Legends at the NFL Hall of Fame. (Jeff Niesel)