​On Wednesday, I covered the Frieze Art Fair for Reuters. While wandering around looking for feature pictures, I came across twin sisters who were part of a performance artwork entitled "Siamese Hair Twins" by Brazillian artist Tunga. They walked through the galleries holding hands and pointing to various artworks while visitors tried to snap pictures of them on their phones. Apparently, the concept for this performance is for sale for £20,000 (twin sisters NOT included!) The Frieze Art Fair, which is one of the world's leading contemporary art fairs, runs through October 17.  FRIEZE ART FAIRTwin sisters who are part of a performance artwork entitled Siamese Hair Twins by Tunga, walk through the galleries at the Frieze Art Fair in London, Britain October 14, 2015. REUTERS/Suzanne Plunkett FRIEZE ART FAIRTwin sisters who are part of a performance artwork entitled Siamese Hair Twins by Tunga, walk through the galleries at the Frieze Art Fair in London, Britain October 14, 2015. REUTERS/Suzanne Plunkett FRIEZE ART FAIRTwin sisters who are part of a performance artwork entitled Siamese Hair Twins by Tunga, walk through the galleries at the Frieze Art Fair in London, Britain October 14, 2015. REUTERS/Suzanne Plunkett ALL PHOTOGRAPHS COPYRIGHT REUTERS