In 2007 she was awarded the art prize of the Tisa von der Schulenburg Foundation. Since her video performance Gender Gamble (2005), the artist has been involved mainly with the theme of the mask, probing the depths between the aspects of concealment and the infusion with performative content. Her vocabulary has developed continuously over the years and has led to the production of series, which display quite diverse medium-form relations and are close to the traditions of post-ideological, anti-authoritarian practices. As the result of her critical, post-avant-gardist positioning, paradoxes play a decisive role in determining the form of her works.

Person #21 combines conceptually the media video and performance to video performance. In this work Felbermayr repeatedly performs a choreography of different gestures and poses, which she took from perfume advertisements. It includes the use of several masking techniques: black and white stage make-up, black and white ink, rectangle, squares, technical mask (keying), colored light etc.