Kendrick Lamar Debuts Powerful New Song on 'Colbert Report'

“You are the last Colbert Report musical guest. Honored to have you on, but keep in mind: Paul McCartney, R.E.M., Jack White and Nas were your opening acts,” Stephen Colbert joked to Kendrick Lamar, who was recruited to provide The Colbert Report’s final performance before the show ends Thursday. To live……