Britney Spears‘ managers have been extra careful with the fragile pop star as she promotes her new album, “Femme Fatale.” Carson Daly, who has known Spears since her “Baby One More Time” era, was instructed that their interview on 97.1 AMP Radio yesterday had to be pre-recorded and submitted to her handlers for approval before it aired. “F THAT!” he spouted on Twitter. “. . . Never that restricted. Even when I interviewed Michael Jackson, it wasn’t anything like this . . . it’s really insane.” He said he was “shocked” her people “won’t let her do a normal interview.” Spears’ rep didn’t get back to us.