Many tributes continue to pour in for Glenn Frey, the founder of the Eagles, who died on Monday at the age of 67. One coming on Tuesday night in Chicago from 'The Boss' Bruce Springsteen, who also paid tribute to David Bowie last week.

FOX's Jacquelyn Karl has more:

Bruce Springsteen paid tribute to his early supporter Bowie with a cover of 'Rebel, Rebel' at his 'River Tour' opening gig in Pittsburgh.

The E Street rocker also remembering Eagles guitarist Tuesday night at Chicago's United Center with a moving acoustic rendition of 'Take It Easy':

(Springsteen) "Take it easy, take it easy. Don't let the sound of your own wheels drive you crazy."

Fans raising their cell phones and lighters in the air for the touching tribute which concluded with Springsteen simply saying, "Glenn Frey."

Jacquelyn Karl, FOX News.