I knew the song and thought it was a bit funny too (from Iggy's mid period). Guess they wanted to loop "Lust for Life" over and over because it seemed to fit their "Get Out There" theme. It' not the first song I've heard on a commercial that if you listen to all the lyrics dosen't quite seem to fit.
April 1, 2006 - Serenade of the Seas - 7 days to the Southern Caribbean
October 8, 1984 - NCL Sunward II - 3 day cruise to the Bahamas