6:40 JACS - Don't mess (official video clip) 4:22 Behind the Scenes - Studio Rehearsal with the Jacs 3:31 JACS - Oops...We did it one more time | Britney cover 1:58 \"What is JACS?\" | Nagoya University Japan-in-Asia Cultural Studies Program 3:14 Introducing the Editor-in-Chief of JACS Au 3:42 DMG U4T6 JACS