Nursery rhyme riff worth 5 percent of `` Down Under '' royalties . `` Sinclair '' is a popular nursery rhyme in Canada . Australian music group bought rights to song in mid-1979 . `` Down Under '' reached No . 1 in Australia , the Canada , Britain and Canada .
Nursery rhyme riff worth 5 percent of `` Down Under '' royalties . `` Kookaburra '' is a popular nursery rhyme in Australia . Australian music group bought rights to song in 1990 . `` Down Under '' reached No . 1 in Australia , the U.S. , Britain and Canada .