The pop group ABBA are back, with new songs for the first time in 39 years. The Swedish group formed in 1972. They are one of the most successful groups ever. They are famous for songs like Dancing Queen. A movie called Mamma Mia! was released in 2008. This had many of their hits. The movie later became a stage show.

ABBA launched a new website about a mystery project. However, ABBA's guitarist accidentally said the group have a new album. There is also a new stage show. ABBA's members will not be in it. The show will have digital, lifelike avatars of each group member. The avatars have the nickname "ABBAtars".