 Complete the following phrase:  The tradition of interval acts between the songs in the competition programme and the announcement of the voting has been established since the inaugural contest in 2003. Interval entertainment has included such acts as girl group Sugababes and rock band Busted , Westlife in , juggler Vladik Myagkostupov from the world-renowned Cirque du Soleil  and singer Katie Melua in . Former Eurovision Song Contest participants and winners have also performed as the interval act, such as Dima Bilan and Evridiki in , Ani Lorak , Alexander Rybak in and Sirusho . Emmelie de Forest and the co-host that year, Zlata Ognevich, performed in . 2015 host Poli Genova and Jedward were two of the interval acts in . ESC 2019 winner Duncan Laurence and 