The Swedish pop maestros sat down with ITV News to discuss a collaboration with another songwriting great and their band's surprise return.
The band posted an official statement on Instagram announcing they had recorded two new songs.
The quartet are to work on a 'ground-breaking' project with former Spice Girls manager Simon Fuller.
Swedish pop group Abba performed on stage together for the first time in more than 30 years.
The first permanent museum dedicated to ABBA has opened, showcasing memorabilia from one of the most successful bands of all time.
Pop group Abba's greatest hits album, Gold, is the biggest selling CD in the UK of all time, according to the Official Charts Company.