When Lionel Richie and Jimmy Buffet shared the bill for a one-time concert in Detroit's Comerica Park on Saturday, one had to wonder who was going to perform Richie's 1983 hit song "All night Long."  Richie, of course, wrote the classic and earned a No. 1 hit with it in 1983, but Buffett performed the song on Richie's latest album "Tuskegee" and has been performing the song on tour this year.  In the end, the two musicians decided they would both perform the song, and then each joined the other onstage during their renditions.  Check out the duo performing the song in the clip below.