"Have You Ever Been Mellow" is the first single of the Party Animals and was released on their debut album Good Vibrations. The track was released in 1996 and became their first number one hit in The Netherlands. The song contains a sample of Have You Never Been Mellow by Olivia Newton-John from 1975. The refrain was also reused except that "never" was replaced by "ever". Musically the song is totally different with a fast gabber beat. The song made the 1996 yearlist at a #21 position. The single was certified Gold. The song remains an often requested song in the Netherlands and reached the 35 position at 3FM's 90s Request Top 100 of 2006.