Britney Spears is said to be feeling “completely out of it’ because her father is so controlling!

Pals of the 27-year-old performer say she’s so strictly guarded by dad Jamie Spears that she has lost track of the time and days of the week.

“She is so out of it she just doesn’t care anymore. She just does what she’s told and is totally in her world,” a source tells Fox News. “She’ll even call people at all hours of night for a general conversation and acts like it’s the middle of the day or something.”

As you may recall, Jamie took charge of Britney’s personal and financial affairs after her emotional breakdown in January 2008 — and now it appears he’s so determined to keep his daughter under control that he is reportedly systematically firing her staff so she doesn’t have the chance to get close to anyone.

“He’s really trying to clean up her image,” the insider adds. “He’s making a lot of changes to the people around her. Everyone is a bit on edge they could be the next one to be replaced. Britney’s family has seen what happens when she gets too close to outsiders and they lose control, they don’t want it happening again.”