Maybe it's a good thing she's stayed within these semi-scandalous boundaries. If Britney were to do something really original, she might actually hurt herself.
At this point, Spears might be advised to follow the example of other scandal-plagued celebrities such as Vanessa Williams and Rob Lowe who were able to remove themselves from the spotlight and then make a comeback.
"She needs to really go into rehab and get into serious therapy," says Castaneda. "She should work on a sense of self and attend to her children, make that the priority in her life."
Here's a rundown of Spears' more scandalous acts -- and her inspirations:
Unknown pop singer making it big by posing provocatively in a sexy music video (Madonna)
On-air lesbian kiss (Jennifer Aniston and Courtney Cox)
Singer starring in bad movie (Madonna)
Making sex video (Paris Hilton)
Posing nude while pregnant (Demi Moore)
Marrying below her station (Elizabeth Taylor, Jennifer Lopez)
Out-of-control partying (Paris Hilton, Lindsay Lohan, et al)
Shaving head (Demi Moore, Natalie Portman)
Getting tattoos (Everyone)
Rush rehab (Lindsay Lohan, Nicole Ritchie)