"Kimagure Princess" (気まぐれプリンセス, Kimagure Purinsesu, "Fickle Princess") is the 41st single by Hello! Project unit Morning Musume. The single was released on October 28, 2009 and was used as the ending theme for TV Tokyo's show, "The Gyakuryū Researchers". It was the last single featuring Morning Musume's seventh generation member Koharu Kusumi. The Single V DVD for "Kimagure Princess" was released on November 4, 2009. The music video for the single was recorded at La Foresta di Magnifica.