Britney does the bare act again!

Britney Spear's bikini pics taken just five days before her head-shaving incident highlight another example of her erratic behaviour.

The singer’s pics that have recently come to light show her posing in a teeny thong with two night spot resident dancers at the Club One nightclub in New York.

The 25-year-old was partying with pals at the nightclub and went backstage to chat with dancers. Once there, she ended up stripping down to her essentials, the Sun reports.

The Toxic singer, who has been in the news for her disastrous interview to OK! magazine looks quite happy and relaxed in these playful snaps.

The pictures also show the two dancers in their bare minimums with one dancer sporting a thong even tinier than Britney’s.

Less than a week after posing for the pics, on February 16 Spears entered an off-shore drug rehabilitation facility in Antigua where she stayed for less than twenty-four hours.

The following night, she went to a haircutting studio in Tarzana, California and subsequently shaved her own hair off with clippers.