The buzz started after photos and videos hit the Web that appeared to show her bulging mid-section to collapse as she sat down during the Australian talk show Sunday Night HD, suggesting she had a prosthetic stomach and that a surrogate was carrying her child. 

But her rep, Yvette Noel-Schure, tells ABC the fake-bump rumors are "stupid, ridiculous and false." 

The pop diva, 30, says she and Jay-Z are expecting their first child in February.