The morning after: Party-pooped Britney looks fragile after a night on the tiles

Sucking on a dummy, she seemed in urgent need of a little TLC herself, as she looked distinctly fragile after reportedly dancing on tables in a wild night out with rocker Avril Lavigne.

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The night out came hours after a judge ordered Britney Spears to undergo random drug testing, but the troubled mother-of-two made it clear she is in no rush to tame her wild ways by heading out on a late-night bender with the Canadian pop singer.

The 25-year-old was first spotted at Hollywood club Winston's before moving on to celebrity haunt Hyde Lounge, where she danced on table tops until the bar closed at 2am.

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An onlooker told American magazine People: "They kept bringing her shots and so they were drinking."

"She was dancing on the tables trying to be really sexy, even putting a black sock over her head as a hat, and putting on a show for everyone."

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Earlier that day, a judge described Britney as a 'habitual and frequent user' of controlled substances and alcohol, and ordered to undergo random drug testing and hire a parenting coach in order to keep her children.

Superior Court Commissioner Scott Gordon ruled: "Based on the evidence presented, the court finds that there is habitual, frequent and continuous use of controlled substances and alcohol by the petitioner".

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Gordon ordered Spears to undergo testing for drugs and alcohol twice per week on random dates and times.

Both Spears and Federline, 29, are to undergo 'joint co-parenting counselling' and the judge said each must refrain from making derogatory remarks about the other.

And the pair were also barred from using drink or drugs for 12 hours before having custody of the children.

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But he saved his most stringent requirements for troubled Britney, who in recent months has exhibited bizarre behaviour after completing a rehab program in March.

Britney was ordered to meet with a counsellor at least once a week to address parenting issues and she must work with a parenting coach at least eight hours a week, according to court documents released after the hearing.

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"The parenting coach is to observe (Spears's) interaction with the minor children and her parenting skills," the Commissioner wrote.

The coach will provide lawyers on both sides with written reports, and will appear in court at the next hearing scheduled between Spear's and Federline on Nov 26.

Federline, 29, who Britney has now divorced, had been asking for increased custody of the boys, but Gordon maintained the current 50/50 joint arrangement.

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The ruling has come in a week in which the star's manager, music guru Jeff Kwatinetz, became the latest of her inner circle to abandon the troubled star. Others include her lawyer Laura Vasser, and her trusted bodyguard, Tony Baretto.

Vasser is said to have quit in frustration - accusing Britney of refusing to take her advice and being impossible to guide.

The singer immediately hired new lawyers Melvin Goldsman and Marci Levine - who represented David Hasselhoff in his divorce from Pamela Bach Hasselhoff.

But, has since changed her mind and hired reknowned divorce lawyer, Sorrell Trope.

Bodyguard Baretto filed a declaration in the custody battle which alleged "issues of nudity by Ms. Spears, drug use and safety issues involving the children."

The terms of the custody ruling in the bitter custody battle between Spears and Federline over their two sons - Sean Preston, 2, and Jayden James, 1 were revealed in documents leaked to celebrity news site TMZ.com.

An increasingly troubled Britney has stunned the public with her behaviour this year. Before entering rehab, she shaved her head bald, was seen attacking paparazzi.

Earlier this month her big comeback performance at the MTV's Video Music Awards was widely panned, as Britney forgot the words as she mimed to new single, Gimme More, was dressed like a stripper, and looked out of shape.