All these Pavarottis followin' me.

Shar Jackson, the ex-girlfriend and mother of Kevin Federline’s other children, is speaking out about Britney’s recent baby seat boo-boo. More specifically, in an interview with Star Magazine, Shar says, “'What was that b***h thinking? Is she crazy? What kind of mother is Britney?'" Um, one married to the father of two of your four children, so I think it’s fairly obvious that both Britney and Shar are missing the good judgment gene right off the bat.

Shar also claims that Britney’s rash decision to drive with baby Sean on her lap, undeniably a bad one, gives her reason to believe that Britney isn’t trustworthy enough to take care of Kori and Kaleb, Kevin’s kids who visit with the Federlines often on the weekends. A source close to Shar reveals that “She's been trying to get Kevin on the phone and tell him he has to sit Britney down and tell her this should never happen again. If Shar doesn't get that kind of assurance, she is going to think twice before she ever allows Kori and Kaleb to stay with him and Britney again.”

Right, Shar. Because you’ve been the model mom, a single parent at age 17, now with four children. Careerwise, you’re still best known for your role as sassy Niecy on the UPN series Moesha, a show that ended its run over ten years ago. And if people don’t recognize you from that, they definitely know you as the woman who procreated not just once, but twice with the ultra-questionable K-Fed. Looks to me like Britney’s not the only one who could benefit from thinking twice before doing something these days…