A Best 2 is a two-part greatest hits album by Japanese singer Ayumi Hamasaki. Both albums, titled Black and White, were released on 28 February 2007 on various formats by Avex Trax. Produced by Max Matsuura, they follow Hamasaki's compilation album A Best, which was released in March 2001. "A Best 2" are concept albums, with Black focusing on darker and more serious tones and White on lighter and more upbeat themes. The albums contain 31 songs, including an unreleased track titled "Part of Me" on the Black edition, that were released between the periods of her albums I Am... (2002) and (Miss)understood (2006).

A Best is the first greatest hits album by Japanese singer-songwriter Ayumi Hamasaki. It was released on March 28, 2001, by Avex Trax and Avex Music Creative Inc. Hamasaki had originally planned to release the greatest hits album after her 2002 studio album I Am..., but the idea was denied by Avex head staff. Instead, Avex released the album in 2001, which caused conflict between the label and Hamasaki. The compilation was released in two different formats including a physical and a digital release. Seven different artworks were released in several editions of the album. The album includes one new track, three re-recorded tracks, and the rest of previously released singles.