watchpregnant Nicole Kidmans rep told us rumors of a second pregnancy with hubby Keith Urban were false after we spotted this mini-bump at the AMA awards, but if she's not with child then why is she hiding her belly?

Nicole, who's currently promoting her new film Nine, had lunch with Harvey Weinstein at Tavern in Brentwood and caused such pap chaos that the first time she tried to leave, she chickened out and went back inside!

Her second attempt was successful, though, and she came out looking so serene, you wouldn't know from looking at the pix that there was a swarm of photogs taking her picture.

Is that just because of the botox? Or is it the happy pregnancy hormones at work?