<P> Several "developmental" tracks were produced and recorded in 2011 before Exo's official debut into entertainment industry but never made it into the first EP Mama . Some of these tracks were included on the XOXO album, including "Black Pearl" and "My Lady". </P> <P> In July 2013, a re-package version of' XOXO', renamed 으르렁 (Growl), was developed with three additional tracks . The single from this edition was its title track "Growl" (으르렁). The song was recorded in both Korean and Mandarin Chinese ("咆哮") versions . Composed by Hyuk Shin (Joombas), DK, Jordan Kyle, John Major, and Jarah Gibson, "Growl" is a dance - pop song with contemporary R&B and funk influences . The single was prematurely leaked online on July 27, when a video of the group practicing to the Korean version of the song was uploaded to various video - sharing websites . </P> <P> May 30, 2013, the Korean and Chinese versions of the music video for "Wolf" were released, and the song's first performance was made on M.net M! Countdown . Both song versions were released digitally on June 3, 2013, and on the same day, two physical formats of the entire album XOXO were also released in South Korea: a "Kiss" edition in Korean and a "Hug" edition in Mandarin . After a performance on SBS Inkigayo on June 3, 2013, Exo visited and thanked 2,000 fans who had been waiting at a nearby park to meet them . The first performance of the Mandarin version of the song was aired on a popular Chinese variety show Happy Camp in mid-June . </P> <P> The album reached over 300,000 collective pre-orders, and peaked at number one on the Billboard World Album Chart a week after release . As of December 2013, the Korean and Chinese versions of the album, as well as their respective repackaged versions, have collectively sold over 1,070,000 copies, making it the best - selling album of the year in the K - pop industry . With over a million copies sold, XOXO also became Korea's best - selling album in 12 years . </P>

Difference between exo xoxo hug and kiss version