Sanna Viktoria Nielsen is a Swedish pop singer. She had attempted to represent her country at Eurovision seven times (2001, 2003, 2005, 2007, 2008, 2011 and 2014), finally making it through on her seventh try.

Representing Sweden at the Eurovision Song Contest 2014 in Copenhagen with the song Undo, Sanna was one of the heavy favorites along with Armenia and Hungary, and had won the OGAE's 2014 fan poll in convincing fashion. Eventually, she finished in 3rd place in the grand final after qualifying from her semifinal in second place. Later that year, she released the album 7, the title referring to her 7 attempts at Melodifestivalen.

The following year, she served as co-host of Melodifestivalen 2015 and was also one of the commentators for Swedish broadcaster SVT in Vienna.

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