BeyonceSeemingly putting to rest the flap around Friday's Internet pregnancy report, Beyonce Knowles partied away her Saturday night in Las Vegas.

The singer wore a skin tight gold sequin dress as she rocked the Tao nightclub with husband Jay-Z following his Vegas concert.

"She was sipping on Ace of Spades champagne," says one fellow party-goer. "And the group was out until 4 AM."

This is not what you would call nesting. "She was having a lot of fun and dancing," says the partier.