 To commemorate their 10th anniversary on July 21, 2007, KinKi Kids released a best-hits album entitled "39" on July 18, 2007.The numbers three and nine are pronounced as in Japanese and sound similar to "Thank You" in English, signifying KinKi Kids' gratitude to their fans for their support for the past 10 years.The album features the top 11 song favorites, as voted by fans as well as two individual 14-song favorites lists from Koichi and Tsuyoshi, coming to a total of 39 songs, hence the title.