All Singles Best: Thanx 10th Anniversary

All Singles Best: Thanx 10th Anniversary (stylized as All Singles Best ~Thanx 10th Anniversary~) is the second compilation album by Japanese singer and songwriter Rina Aiuchi. It was released on 16 December 2009 by Giza Studio, in celebration of the 10th anniversary of the singer's debut. The album contains all her thirty-three singles from the singer's first seven studio albums, as well as three new songs which were released as singles. The standard edition of the album contained the previously unreleased song, "Gift". The compilation album superseded Single Collection (2003), which contained twelve of the singer's first fifteen singles, except "Ohh! Paradise Taste!!", "Faith" and "Over Shine".

All Singles Best: Thanx 10th Anniversary reached number seven on the Oricon albums chart and has sold over 38,109 copies. Eventually the album became the 204th best-selling album of 2010 in Japan.