Article continues below advertisementKeith Urban has become the subject of industry whispers after performing on a luxury country music cruise in the wake of his divorce from Nicole Kidman, with sources telling OK! the unusual gig has dented his image among his musician pals.Urban, 58, took to the stage aboard the Top Shelf Country Cruise in early March, performing for around 1,000 passengers traveling between Florida and the Bahamas. The seven-day voyage, which ran from February 27 to March 6, featured a lineup including Riley Green, The Mavericks, Lauren Alaina and Chris Young.