Aleksandra Janković ( ; born 29 April 1988 ) , professionally known as Sashka Janx ( ) and Miss Jukebox , is a Serbian singer-songwriter . She was previously a backing vocalist for numerous other artists , including Milan Stanković at the Eurovision Song Contest 2010 , Nina Radojičić at the Eurovision Song Contest 2011 and Bojana Stamenov at the Eurovision Song Contest 2015 . In 2012 , Janković participated in '' Prvi glas Srbije '' , a musical talent show similar to '' The Voice ''
Eurovision Song Contest 2010
Eurovision Song Contest 2010
Saška Janković