Kenny Chesney's next single will be "Beer in Mexico," a song he wrote at the swimming pool while in Cabo San Lucas, Mexico, while attending Sammy Hagar's birthday celebration. Recalling that most of the crowd had gone fishing, Chesney said, "I just decided to stay behind. I didn't even know why until suddenly this song started coming to me." BNA Records will officially start seeking airplay on Jan. 8. It's the latest single from Chesney's The Road and the Radio album.