Example of stupid copyrights...

It's 70 years after the original Australian children's song came out, and a small snippet can't be used as part of a pop song talking about Australia???  If we'd always had these laws, half of classical music wouldn't exist, as it often includes sections of other pieces (e.g. Mahler 1, 3rd movement, Carnival of the Animals, variations on a theme by Paganini, ...)

http://www.cnn.com/2010/SHOWBIZ/Music/02/04/down.under.kookaburra/index....