Kenny Chesney played Margaritaville at the Fan Fair concert at Nashville’s Adelphia Coliseum on Thursday night’s (June 13)
http://www.cmt.com/news/feat/rca.show.061402.jhtml
Near the end of the page:
“…and Chesney can be forgiven for bowing to Buffett by breaking nto ‘Margaritaville’ midway through ‘How Forever Feels.'”