Willie Nelson has teamed up with some of the best voices in music, but REALLY outdid himself with his latest duet partner. The proud outlaw country star showed off his sensitive side onstage at the Luck Reunion by inviting Kermit the Frog onstage for a rendition of their 1980’s classic, “The Rainbow Connection.” The fun amphibian called KB and Heather Lee this week to chat about his old buddy, being green and his A-list wife even got a word in . . . along with a strong right hook.