For our third installment of the annual nasty-nappy list, we offer these parentally challenged parties a slew of not-so-fresh-smelling accolades:

Mommy Run Amok award: Britney Spears
Last year we called Britney on a couple of car-safety snafus involving now 2-year-old Sean. But after the birth of second son, Jayden, now 14 months, the singer entered a new world of parenting no-no's: drinking and smoking around the kids; allegedly filling their bottles with soda and feeding them chewing gum (an obvious choking hazard); and stretching their bedtimes much too late (Mommy needs her morning rest to recover from partying). In June the boys watched from their car seats as Brit-Brit severed ties with her mom, Lynne, apparently accusing Grandma of abusing prescription drugs, and they looked on as Britney threatened to "kill" a photographer who snapped her violating the terms of her then-custody agreement by taking the kids from California to Las Vegas without notifying ex-hubby Kevin Federline. So no one seemed surprised when, on October 1, a judge made the "toxic" mother turn over the boys to their dad. As this issue went to press, K-Fed had full custody -- and we were hoping someone would get Brit the help she sorely needed.

Next: Virgie Arthur

photo: Splash News