Infinitely Polar Bear : What's the song the daughters are singing to?

The elder daughter is playing the piano and singing somethinganyone know? It's when the younger daughter is dancing then their father gets mad and throws a dish on the floor making a mess.

It *might* be "Jonah, Come Out the Wilderness"not sure. :)

http://www.allmusic.com/album/infinitely-polar-bear-mw0002858026

Thank you..searching for it

The song is called "The Pirate Song" and was written and played by the elder daughter who is playing her mother as the eldest daughter.

Thank you! Do you know where I can listen to it besides the movie? I find it very catchy