Sanna Viktoria Nielsen (born 27 November 1984) is a Swedish singer and television presenter. On her seventh attempt, she won Melodifestivalen in 2014 with the song "Undo" and so represented Sweden in the Eurovision Song Contest 2014 in Copenhagen, Denmark, finishing in 3rd place overall. Sanna was one of the Eurovision Song Contest 2015 commentators for Sweden and hosted Melodifestivalen 2015 along with comedian Robin Paulsson. She was announced as the new presenter for the sing-along show Allsång på Skansen for the summer of 2016. She hosted Eurovision The Party at the Tele2 Arena for the Eurovision Song Contest 2016.

Source: Wikipedia (https://en.wikipedia.org/wiki/Sanna_Nielsen)