"River Deep – Mountain High" is a 1966 single by Ike & Tina Turner. Considered by producer Phil Spector to be his best work, the single was successful in Europe, peaking at #3 in the United Kingdom, though it flopped on its original release in the United States. Spector claimed to be pleased with the response from the critics and his peers, but he then withdrew from the music industry for two years, beginning his personal decline.