In March 1975, the single became Newton-John's second consecutive number-one hit on the US BillboardHot 100 and also topped the BillboardHot Adult Contemporary Singles chart. "Have You Never Been Mellow" continued Newton-John's success as a crossover artist when it peaked at No. 3 on the Hot Country Singles chart. The record also received a Grammy nomination for Best Female Pop Vocal Performance. In the United States, it was Newton-John's fourth straight single to be certified gold for sales of one million copies. "Have You Never Been Mellow" also reached number one in Canada and peaked at number 10 in Australia and number 26 in Japan, but was not much of a success elsewhere in the world, failing to chart altogether in the United Kingdom.
Chart performance
Weekly charts
Year-end charts
Cover versions
The song was performed as part of the 2007 Broadway musicalXanadu. Along with her later single "Xanadu", a remixed version by The Olivia Project appears in the Dance Dance Revolution series of video games. Hank Marvin recorded an instrumental version on his 'Hank Marvin Guitar Syndicate' album in 1977 The Dutch band Party Animals sampled the song in 1996 on their happy hardcore hit "Have You Ever Been Mellow". The song reached number one in the Netherlands. The punk band the Feederz covered the song on their 1984 debut album "Ever Feel Like Killing Your Boss?". The Nip Drivers was another punk band that covered it. Australian singer James Reyne covered the song on his 2004 release Speedboats for Breakfast. His version is a raucous, punk-influenced take on the song. Belgian liquid drum & bass prodigy Netsky sampled the song on his 2010 debut album Netsky, using the vocals of Terri Pace on the song "Mellow". Me First and the Gimme Gimmes covered the song on their all Australian covers 2011 EP, Go Down Under. A French cover was recorded by Nicole Rieu, "Ma maison au bord de l'eau", was released in 1975. In 2001, Japanese singer and voice actress Rie Tanaka recorded the song for her album Garnet. Olivia's original version had been a big hit in Japan in 1975. In 2006, German DJ duo Tune Up! released a Hands Up song entitled "Have U Ever Been Mellow" that sampled the song's lyrics. This was later re-released on their 2010 album Ravers Fantasy. In 2016, Dutch DJ duo Showtek released a Hardstyle song entitled "Mellow" that sampled this song's lyrics with Technoboy and Tuneboy. In 2017, Japanese singer-songwriter Rina Sumioka covered the song in her album Colors. Juliana Hatfield covered the song on her album Juliana Hatfield Sings Olivia Newton-John.
