Rick Marty, also known as Maddog (born Richard Madenfort), is a musician and former pornographic actor, and is a friend of Lady Gaga's fiance, Taylor Kinney. A music producer at ABC Television, he met Gaga on the set of Lady Gaga & the Muppets' Holiday Spectacular. The pair hit it off musically and have been playing non-Gaga music whenever possible. They have been hosting celebrity jam sessions in both Harrisburg, Pennsylvania and Nashville, Tennessee as a way to be involved with playing music but without having the business side get in the way. __INDEX__