The 9th best album in the Petit Best series, which are annual compilations released at the end of the year that feature best hits from the artists of Hello! Project during that year, with an occasional remix or new song included.
Petit Best 9 (2008) is currently not available on any services.
Ai Takahashi , Risa Niigaki , Eri Kamei , Sayumi Michishige , Reina Tanaka , Koharu Kusumi
