In this April 6, 1974 file photo, members of Swedish group ABBA and close associates celebrate the victory of their song “Waterloo” in the Eurovision Song Contest in Brighton, England. The four members of ABBA, Benny Andersson, left, Annifrid Lyngstad, third left, Agnetha Faltskog, second right, and Bjorn Ulvaeus, right, , second right, were the most successful winners of the Eurovision Song Contest, enjoying unprecedented success after their victory. The final of this year's competition takes place on Saturday, May 14 in the Swedish capital Stockholm. (Photo by AP Photo)





In this Saturday, May 10, 2014 file photo, Conchita Wurst representing Austria performs the song “Rise Like a Phoenix” during the final of the Eurovision Song Contest in the B&W Halls in Copenhagen, Denmark. Wurst was one of the most memorable contestants and winners in the history of Eurovision, which takes place this year in the Swedish capital Stockholm. (Photo by Frank Augstein/AP Photo)





In this early Sunday, May 21, 2006 file photo, Finnish group Lordi celebrate after their victory in the Eurovision Song Contest at the Indoor Olympic stadium in Athens, Greece. The annual competition had never seen anything like Lordi, who won with their song “Hard rock hallelujah”. It's unlikely there will be any band quite like Lordi at this year's event in the Swedish capital Stockholm, the final of which takes place on Saturday, May 14. (Photo by Petros Giannakouris/AP Photo)





In this Thursday, May 16, 2013 file photo, Finland's Krista Siegfrids, second right, kisses a dancer as she performs her song “Marry Me” during the second semifinal of the Eurovision Song Contest at the Malmo Arena in Malmo, Sweden. That was the first girl-on-girl kiss in the history of the annual competition. Previously, organizers had sought to prevent similar embraces citing the competition's status as a family event. (Photo by Alastair Grant/AP Photo)





In this Saturday, May 23, 2015 file photo, Guy Sebastian representing Australia performs the song “Tonight Again” during the final of the Eurovision Song Contest in Austria's capital Vienna. His performance was the first by an Australian in the annual contest. (Photo by Kerstin Joensson/AP Photo)





In this Wednesday, May 11, 2011 file photo, Moldovan band Zdob si Zdub performs the song “So Lucky” during the rehearsal for the second semifinal of the Eurovision Song Contest in Duesseldorf, Germany. The costumes on display raised a chortle and no doubt there will be further similar moments at this year's competition, the final of which takes place Saturday, May 14 in the Swedish capital Stockholm. (Photo by Frank Augstein/AP Photo)





In this Saturday, May 9, 1998 file photo, Germany's Guildo Horn performs on stage in the final dress rehearsal ahead of the final. Horn, a cult figure in Germany, made waves in 1998 with his velvet trousers, platform shoes and ruffled shirt. He rushed across the stage, playing cowbells and climbing up on the scaffolding, too. Similar eccentricities are expected at this year's event in the Swedish capital of Stockholm, the final of which takes place on Saturday, May 14. (Photo by Louisa Buller/AP Photo)





In this March 21, 1970 file photo, Ireland's entrant Dana sings the winning song “All Kinds of Everything” in the Eurovision Song Contest, in Amsterdam, Netherlands. The song would become a worldwide hit and helped launch Dana to stardom. She then went into politics joining the European Parliament . Dana even ran unsuccessfully to be president of Ireland . It's not clear if anyone at this year's event in the Swedish capital of Stockholm has similar ambitions. (Photo by AP Photo)





In this Sunday May 10, 1998 file photo, Israeli singer Dana International celebrates her victory in the Eurovision Song Contest at the Birmingham Indoor Arena, England. The Israeli was the first transgender person to win the annual competition. Though there was uproar in some sections of Israeli society, Dana's performance of “Diva” captured the hearts of voters across Europe. (Photo by Louisa Buller/AP Photo)





In this Friday, May 25, 2012 file photo, Russia Buranovskiye Babushki perform during a rehearsal for the final of the 2012 Eurovision Song Contest at the Baku Crystal Hall in Baku, Azerbaijan. They garnered much public affection for their cute onstage presence that included some choreographed baking in an onstage oven. (Photo by Sergey Ponomarev/AP Photo)





In this Wednesday, May 15, 2013 file photo, Cezar of Romania performs his song “It's My Life” during a rehearsal for the second semifinal of the Eurovision Song Contest at the Malmo Arena in Malmo, Sweden. This was Dracula reborn with a techno beat, pyrotechnics and a falsetto voice – another in the competition's long list of bizarre spectacles. (Photo by Alastair Grant/AP Photo)





In this Tuesday, May 12, 2009 file photo, Czech Republic's band Gipsy.cz performs during the Eurovision Song Contest's first semi-final at the Olympic Stadium in Moscow, Russia. The Roma hip-hop group scored the infamous “nul points”. (Photo by Sergey Ponomarev/AP Photo)





In this Saturday May 24, 2003 file photo, Austria's entry in the Eurovision Song Contest 2003 Alf Poier sings his song “Man is a Measure of all Things” during the final in Riga, Latvia. The 36-year-old cabaret singer and comedian billed himself as the “anti-Eurovision” contestant and his performance featured cut-out animal figures. (Photo by Alastair Grant/AP Photo)





In this Saturday, May 21, 2005 file photo, dancers with Matrin Vucic of Macedonia perform during the rehearsal for the Eurovision Song Contest in Kiev, Ukraine. There are always some risque performances at the annual competition and no doubt there will be more at this year's event in the Swedish capital Stockholm, the final of which takes place on Saturday, May 14. (Photo by Sergey Ponomarev/AP Photo)





In this Wednesday, May 20, 2015 file photo, Sweden's Mans Zelmerlow performs the song “Heroes” during a dress rehearsal for the second semifinal of the Eurovision Song Contest in Austria's capital Vienna. Zelmerlow won the competition last year with a performance featuring animated dancers. His victory means that Sweden is hosting this year's event, the final of which is due to take place in the capital Stockholm on Saturday, May 14. (Photo by Kerstin Joensson/AP Photo)





Armenia's Iveta Mukuchyan performs “LoveWave” during the first Eurovision Song Contest semifinal in Stockholm, Sweden, Tuesday, May 10, 2016. (Photo by Martin Meissner/AP Photo)