Singer for Singer is Misia's sixth studio album and first conceptual one, released on December 8, 2004, only ten months after Mars & Roses. It sold 167,518 copies in its first week and peaked at #3. Singer for Singer features collaborations with Toshinobu Kubota, Fumiya Fujī, Glay, Chara, Kazufumi Miyazawa (The Boom), Eisho Higa (Begin) and Kōji Tamaki.The album is certified Platinum for shipment of 250,000 copies.