Cavorting with two men in a skimpy see-through lace outfit, this is Britney Spears filming scenes for her latest controversial song, 3.

The track has already claimed the top spot in the US charts and is taken from her forthcoming album The Singles Collection, to be released next month.

Masterminded by Max Martin - the producer who helped catapult 16-year-old Spears into the world spotlight with Hit Me Baby One More Time 10 years ago - the lyrics fall back on the Britney tried and tested sexy routine. While the lyrics are less controversial than her last hit If you seek Amy (which refers to sexual intercourse), the song mentions 'Peter, Paul and Mary' - not a homage to the '60s folk group, but a sexual slangword for a threesome.

On the track, Britney, 27, sings: 'Three is a charm, two is not the same, I don't see the harm, so are you game?'

And the video was also shot in true Britney style, with the mother of two spending most of her time grinding against two muscular male dancers in the lace outfit.

She then switched to a flesh-coloured leotard to continue the steamy routine, which she filmed in Los Angeles last week.

Her new song 3 will be released in the UK on November 16, ahead of her The Single Collection, set to hit shelves on November 23.

In a statement, Britney said, "I want to thank my fans for making 3 the Number 1 song on the Billboard Hot 100. I am truly blessed with the greatest fans in the world and I am so happy y'all love it because I do this all for you."

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