ABBA stars sue tribute show

Co-creators of the hit musical Mamma Mia! And ex-ABBA stars Bjorn Ulvaeus (pictured) and Benny Andersson are suing the producers of a smaller-scale tribute touring show of the same name.

Producers of the $145.8m (€118m)-grossing show want the tribute concert to change its name and have accused it of infringing their trademarks.