Question about a song that may be Hawaiian or Regaee?

All I can think of is one scene in "Forgetting Sarah Marshall", in which Jason Segal and Mila Kunis are at a a bar (Lazy Joe's) and a band is playing some reggae beat song, but with Hawaiian lyrics. OR it could be from "50 First Dates", with Adam Sandler, also filmed on Oahu. OR....none of the above! Thought I'd give it a whack.