Tegan (left) and Sara Quin perform at Coachella in 2008, following the release of the duo&#039;s fifth album, &lt;em&gt;The Con&lt;/em&gt;. Tegan and Sara are celebrating the 10th anniversary of &lt;em&gt;The Con &lt;/em&gt;with a tour and an album of covers performed by musicians influenced by the original album.