a -nation's party is a special project which is composed by Avex Trax most popular artists including Hamasaki Ayumi, Koda Kumi, Otsuka Ai, TRF, hitomi, Every Little Thing, Do As Infinity, Suzuki Ami, ICONIQ, GIRL NEXT DOOR and AAA. These artists perfomed all together the song THX A LOT which is the first official theme song of a-nations (summer festivals hold by Avex Trax's artists).