Out Works & Collaboration Best

Out Works & Collaboration Best is the fourth compilation album by Japanese singer-songwriter Koda Kumi, released two months after her studio album Trick, and the same day as her second remix album, Koda Kumi Driving Hit's. The album peaked on the Oricon charts at No. 7, staying on the charts for eight weeks.

The album housed most of her collaborative efforts with artists from varying labels, including KM-MARKIT from Pony Canyon and Fergie from Interscope Records. The only track to not be a collaboration was the first track, "Get It On", the short version of which had been released as the opening on her second compilation album, Best ~second session~ (2006).