A Summer Best is the 6th compilation album by Japanese singer-songwriter Ayumi Hamasaki released on August 8, 2012. The album contains 24 old songs plus two new tracks - "You & Me" and "Happening here" - over 2 discs. The album is available in two versions: 2CD and 2CD+DVD.

Ayumi Hamasaki is a Japanese singer, songwriter, record producer, actress, model, spokesperson, and entrepreneur. By 2002, Hamasaki had earned the nickname "Empress of J-pop" due to her popularity in Japan and throughout Asia, as well as being referred to as "the voice of the lost generation". Due to her success and relevance throughout her career, she is considered one of the top solo female artists of the Heisei era for her influence on the music industry and various fashion trends.