In the TV show Wer singt für Österreich? (Who sings for Austria?) on Friday night, ten acts were vying for the chance to represent Austria in Stockholm later this year.
The public and jury selected the 19-year-old Zoë as the final winner. She is the daughter of Christof Straub, who plays guitar in the band Papermoon.
The decision was made by TV viewers and an expert jury, consisting of Conchita Wurst, madita, and Julie Frost. The fourth juror was made up from a combination vote of several local Austrian media experts.
Austrians have been huge fans of the Eurovision Song Contest since it was won by local talent Conchita Wurst in 2014.
Unusually, the song Loin d'ici is sung by Zoë in French. The Eurovision Song Contest is the world's largest song competition, watched by an estimated television audience of nearly 200 million people.
The 2015 contest was held in Vienna, and was won by a Swedish act, Måns Zelmerlöw with the song Heroes.