 The posthumous remix album released in 2013 (entitled "Love to Love You Donna") and its singles were released by Verve Records, by then part of Universal Music Group, who had long since owned the rights to Summer's Casablanca/PolyGram recordings from 1975 to 1983.From the inception of the "Billboard" Dance Club Play chart (also known as Club Play Singles, and formerly known as Hot Dance Club Play and Hot Dance/Disco) until the week of February 16, 1991, several (or even all) songs on an EP or album could occupy the same position if more than one track from a release was receiving significant play in clubs.Beginning with the February 23, 1991 issue, the dance chart became "song specific," meaning only one song could occupy each position at a time.