Nas, RBX, KRS-One and B-Real, named together as Group Therapy, recorded and released a song called "East Coast / West Coast Killas" on Dr. Dre's compilation album "Dr. Dre Presents... The Aftermath" (1996).
The song conveys the message that the East Coast-West Coast hip hop rivalry of the time was unnecessary. The track uses a sample from Quincy Jones' song, "Ironside".

Group Therapy were a New York-based quintet active in the late 1960s. The group featured Ray Kennedy (b. 1947; vocals), Art Del Gudico (b. 1946; guitar), Jerry Guida (b. 1948, organ), Tommy Burns (b. 1947; drums) and Michael Lamont (b. 1948; drums). The group's debut album largely comprised of contemporary hits, notably "Hey Joe", "Morning Dew" and "Come See About Me" with a sound linked to the late sixties Long Island N.Y. area similar to Vanilla Fudge, Rascals etc. and Jimi Hendrix as evident by a version of the aforementioned "Foxy Lady", "Morning Dew", and "Hey Joe" in Jimi's style. An unknown quantity when they supported Moby Grape on a brief UK tour in 1968, Group Therapy impressed audiences with their exciting, soul-based stage act. (Internet Sources) Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.