Abba’s Bjorn Ulvaeus

"Mamma Mia", the stage musical, brought ABBA's Bjorn Ulvaeus back to work in Australia for the first time since the 70's. In this interview with Ian Keenan he discusses how the musical came about, some trivia concerning ABBA hits and how Bjorn felt about touring in the 70's. You might also be interested to find out what was the biggest lie reported about ABBA.