It's 50 years since Swedish pop group Abba won the 1974 Eurovision Song Contest.The victory provided a platform for the band to become one of the most popular and successful musical groups of all time.Abba's current manager, Görel Hanser, has been with them every step of the way. In a rare interview, she speaks to Matt Pintus about the band's meteoric rise to stardom.She also talks about Abba's break-up, the rumour that they were offered $1 billion to get back together and whether Abba Voyage will move to a new country. (Photo: ABBA pictured in 1974. Credit: Getty Images)