Beyoncé Knowles has released a new music video for her single "Countdown", showing off her pregnant figure in a range of 60s-inspired constumes.

She may have ditched the high-heeled routines of some of her previous videos - such as the award-winning "Single Ladies"  - but as the video shows, she's still in fine dancing form.

The pop superstar is expecting her first child in the new year with husband Jay-Z. She went public with the news at the MTV Video Music Awards in August after dreaming of unveiling her baby bump on the red carpet.

Beyoncé admits she chose the glitzy prize-giving to announce her baby news to the world because she had dreamed about it in her sleep.

"You know, I dreamt it, actually. There were so many rumours about me being pregnant every three months for the past couple of years - I thought the best way and classiest way was to just show it," she told Access Hollywood.

"And my husband and I have been together for 10 years, so I guess people felt a part of it and it makes me feel really good."

The baby is due around January next year. Rumours say that Beyoncé filmed three music videos in one week after finding out she was pregnant, to support the release of her latest album, 4.

All of which begs the question: does she ever sleep?