In June 2006, AFI's seventh studio album, "Decemberunderground", was released on Interscope Records. The album's first single "Miss Murder" reached No. 1 on the Billboard Modern Rock Charts. The release reflects the continually changing and growing fan base of the band, and the album debuted as No. 1 on the Billboard charts. The album has been certified Gold by the RIAA for sales of over 500,000 copies of the album. Also, the band's second single, "Love Like Winter", enjoyed tremendous success on MTV's "Total Request Live" and was retired after 40 days on the countdown. Ralph Saenz, better known as Michael Starr, singer of the glam metal band Steel Panther has provided background vocals for these two albums. "Decemberunderground" was promoted by an ARG known as "The Charlotte Mystery" that culminated in fans who solved the puzzles being invited to April 2006 private shows in Los Angeles, New York City, and San Francisco.