You could say Yves Saint Laurent and Claude Lalanne got carried away. In 1974, the fashion designer commissioned his favorite artistic collaborator to craft two mirrors for the Salon de Musique of his Paris apartment. By 1985, Lalanne had made 15, each framed in gilt bronze and alive with electroplated leaves plucked from her garden. The commission established the mirror as a Lalanne hallmark, offering her botanical fantasies on a scale beyond jewelry and tableware. On April 22, Saint Laurent’s group of mirrors sold at Sotheby’s for a whopping $33.5 million, far eclipsing its high estimate of $15 million. The result, reached after a lively 10-minute bidding war, sets a new auction record for the artist and is the highest price ever realized for a work of design at auction, according to Sotheby’s. One of Claude Lalanne’s mirrors created for Yves Saint Laurent. Photo: courtesy Sotheby’s. The mirrors emerged from the collection of Jean and Terry de Gunzburg .…