It's official: Britney Spears is Hollywood's worst mother - ever.

When she hands over her two young sons, Sean Preston, 2, and Jayden James, 1, to ex-husband Kevin Federline tomorrow, America can breathe a collective sigh of relief that those tots will no longer have to endure their mother's gross incompetence.< p>

The laundry list of poor treatment is long.

Spears reportedly abused drugs and alcohol while caring for the boys, strutted around the house naked, fed the babies gum and other sugary sweets and never bothered to brush their teeth.

Worse, she put them in constant danger on the road when, legally, she shouldn't even have been behind the wheel.

When Sean Preston was only 4 months old, Spears peeled out of a Malibu Starbucks with the baby on her lap and one hand on the wheel.

Then there was the time she nearly dropped him in New York.

Spears has treated these two little boys like rag dolls, trotting them out in public fully knowing an aggressive paparazzi mob awaited at every turn, and then mistreating them at home with her parental feebleness.

Her mothering skills follow in the footsteps of some truly horrid celebrity parenting:

There's "Mommie Dearest" Joan Crawford, who launched into an alcoholic rage at her adopted daughter Christina for hanging her clothes on wire hangers; Lana Turner, who dumped daughter Cheryl Crane with various nannies for months at a time before Cheryl eventually killed one of her mother's boyfriends, and an erratic and verbally abusive Judy Garland.

Bad "mommy" Michael Jackson once dangled son Prince Michael 2nd (the bad parenting started when he named him that) over a fourth-floor balcony at a hotel in Berlin.

Too bad for Spears that her poor child-rearing skills are on display during a golden age of Hollywood mommies.

The public is so peppered with photos of loving, careful celeb moms like Angelina Jolie, Reese Witherspoon, Gwyneth Paltrow, Gwen Stefani and Jennifer Garner that the sight of barefoot Britney balancing one of her disheveled boys and an ice cream cone is even more shocking.

It is a sad day when the clear choice for custody goes to Federline, a man who has two out-of-wedlock kids, shows zero paternal instincts - not to mention zero talent - and is club hopping all over Vegas.

Those poor kids.