Do your buttons up, Britney.and watch out for that bald patch

Britney Spears appeared topless in uncensored outtakes from her racy Gimme More video and it seems the singer is still refusing to cover up.

The troubled star stepped out in LA yesterday in a tight red dress, which was unbuttoned right down to reveal her braless cleavage.

It wasn't the only sight that caught attention - Britney also appears to have developed a small bald patch on the back of her head after years of wearing heavy extensions.

Going pop: Britney Spears sure has come undone

Testing times: Britney is rumoured to have undergone a drug test during a visit to a medical centre yesterday

The dishevelled star was visiting a local medical centre where she is rumoured to have undergone a mandatory drug test as part of her custody arrangement.

Lawyers for the singer have filed an emergency court motion seeking to expand visitation rights with her boys, who she lost custody of last week.

Spears left a supervised visit with her boys in tears earlier this week.

Hair raising: years of wearing heavy hair extensions have left Britney with a small bald patch

Mark Vincent Kaplan, lawyer for Spears' ex-husband Kevin Federline, said that he received the motion Wednesday and will be in court Thursday.

An after-hours call to Spears' attorney was not immediately returned.

Spears was ordered October 1 to relinquish custody of her children by a court commissioner who had raised concerns about drug and alcohol use.

Superior Court Commissioner Scott M. Gordon later granted some visitation rights to Spears, but required that a monitor must watch her while she's with her sons, 2-year-old Sean Preston and 1-year-old Jayden James.

Meanwhile, the release date of Britney's new album Blackout has been brought forward because of internet leaks.

Originally due to be released on November 12th, it will now be available from October 29.

Hunger strikes: the singer stopped off at a Mexican restaurant for lunch with a friend