The first true compilation album from the band was released in 2001 by their former label at MCA: "20th Century Masters: The Millennium Collection: The Best of Donnie Iris", featuring material from the band's four MCA-released albums from the early 1980s. In 2004, the band celebrated its 25th anniversary with a new compilation album featuring their rarer material, "25 Years", and performed live at the Chevrolet Amphitheatre in Pittsburgh, Pennsylvania for 4,000 people. This concert was known for featuring a four drummer lineup of current and previous drummers for the band; Kevin Valentine, Tommy Rich, Brice Foster and Mark Avsec's daughter Danna Avsec, who was the guest drummer. Since then, the band has used a three drummer line-up for several concerts.