Britney Spears has tweeted a leak of her new single 'Hold It Against Me'.

The song, due next week, was leaked in an earlier form this week. 'Heard an early demo of my new single leaked,' Britney posted. 'f you think that's good, wait til you hear the real one Tuesday.'

Britney's last studio album was 'Circus' in December, 2008. It sold 1.7 million in the USA. She also released 'The Singles Collection' in November, 2009. It featured the new song '3'. It stalled with 153,000 sales in America.

At this stage, 'Hold It Against Me' appears to be a one-off single. There is currently no album scheduled.