No 2,200 square-foot nurseries here!

For her latest video -- evidently shot before her pregnancy curves were apparent to all -- Beyonce gets her "swagu" on in a trailer park..

In the sexy, over-the-top new "Party" video, the multi-millionaire singer, wife to Jay-Z and mom-to-be rocks out in low-income housing.

Beyonce (who is prepping a 2,200 square-foot nursery for her unborn child in the Tribeca apartment she and Jay-Z share, according to a source), wears a sexy low-cut swimsuit in a pool, lounges in a plastic beach chair, hangs in a teeny bathroom, mows the lawn in a yellow fur coat and more.

The star's first child is due in February.

Watch the sexy, outrageous new video now.