Abba stars Benny Andersson and Bjorn Ulvaeus are taking legal action against a Danish far-right party which has used their 1976 hit Mamma Mia at rallies. Mr Andersson said the band never allowed their music to be used for political purposes. The youth wing of the Danish People's Party (DF) had also changed the lyrics of the song to Mamma Pia, in honour of their leader Pia Kjaersgaard. The anti-immigration DF is the third largest party in the Danish parliament. The top-selling song had been played at DF rallies and meetings and a version of the song had been performed for Ms Pia by members of the party' youth wing, say reports. Mr Andersson said he found out about its use when he was contacted by a left-wing pressure group who asked whether he supported the party's policies. 'No politics' He said he and Mr Ulvaeus had instructed lawyers to start legal actions against the party if they did not stop using the song immediately. "Firstly, you cannot just rewrite songs as you like and secondly we want them to understand that we have absolutely no interest in supporting their party," he said. "Abba never allows its music to be used in a political context. This is something that we have pointed out to the Danish People's Party." The musicians are not the first to complain about the political use of their songs. During the 2008 US presidential campaign, several artists, including Heart and the Foo Fighters criticised John McCain and Sarah Palin for using their songs at rallies without permission. And in 2009, a group of artists in the UK complained that copyright laws meant they had no legal right to prevent the far-right British National Party from selling an album using their songs to raise funds. Source: BBC