Peter Rauhofer (29 April 1965 – 7 May 2013) was an Austrian-American disc jockey (DJ), remixer and producer who formerly worked under the moniker Club 69 as well as Size Queen.

He has also provided remixes for Donna Summer, Kylie Minogue, Whitney Houston, Jessica Simpson, Britney Spears, Christina Aguilera, Yoko Ono, Pink, Tori Amos, Pet Shop Boys, Depeche Mode, Yazoo, Frankie Goes to Hollywood, Book of Love, Soft Cell, Duran Duran and Mariah Carey, among others.

His party was held weekly at the Stereo nightclub in New York until March 3, 2008, when the City invoked eminent domain and acquired the building.

Rauhofer's first release as The Collaboration was "Do It Properly", a 1999 track produced with Victor Calderone, featuring Deborah Cooper on vocals.

The Collaboration moniker was then used by Rauhofer on "Break 4 Love", a number one Hot Dance Music/Club Play hit featuring Pet Shop Boys.