Posh Spice Victoria Beckham has fueled pregnancy rumors after shunning off champagne in favor of a soda during her birthday bash last week.

An insider has noted that while her guests, which includes A-lister Tom Cruise and wife Katie Holmes, enjoyed champagne at the party in Via Veneto eatery, she was seen drinking only tonic water and pineapple juice.

The guest tells News of the World, "Victoria likes to party with the best of them, especially on her birthday. So a champagne flute is no stranger to her hand. But she didn't touch a drop, which leaves you wondering whether she's already expecting her fourth child."

Victoria, who's married to footballer star David, already has three sons. But David recently revealed to Ellen DeGeneres on her TV chat show that they are "working on" expanding their brood.

He said, "We're working on it. We're very family orientated, so we've always wanted a big family, which was weird because when we first got together we never even discussed how many children we wanted. But it's worked out that we want a big family and we love kids so it's worked out perfect."

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