"Walking with a Ghost" is a song by Tegan and Sara, from their 2004 album So Jealous mostly written by Sara Quin, although credited to both band members, which was released as a single in 2005. The song appears on the soundtrack for the 2005 movie Monster-in-Law and was also used in the season 3 promo for Medium."Walking with a Ghost" was also the subject of a popular mashup when Party Ben combined Tegan and Sara's version with Mylo's track "Paris Four Hundred".