"Maji Desu ka Ska!" (まじですかスカ!, Maji Desu ka Suka!, Seriously, Ska!?) is the 45th single of the Japanese group Morning Musume, released on April 6, 2011 on the Zetima record label. The single sold 33,698 copies in its first week, charting at #5 on the weekly Oricon singles charts and peaking at #7 on the Japan Billboard Hot 100.