While some "celebrities" like Kourtney Kardashian whore their unborn children out for headlines, others choose to keep their private lives to themselves.

Gisele Bundchen is one of those people. The supermodel and Tom Brady aren't ones to divulge pregnancy details - or even find them out personally!

Rumors may be flying that she’s expecting a baby boy, but pregnant Gisele Bundchen says she doesn’t yet know the sex of her baby. Nor will she!

"We decided not to know,” Bündchen, who is expecting her first child, tells Brazilian magazine Caras. "We will only know when it is born, in December."

"I want the emotion of finding out then if it is a boy or a girl," she added.

Not finding out the sex of the baby doesn't mean she’s not already scouting baby clothes - and shoes. Bundchen, who markets a line of sandals in Brazil, loves the baby-size ones: “The baby versions are really cute," she says.

And while she’s already six months pregnant - time flies when you deny it repeatedly, then don't publicize it - Gisele has hardly been slowing down.

She's been busy as the new goodwill ambassador for the United Nations Environmental Program, and is getting her pilot’s license next month.

"I am going to keep traveling, but my home is in Boston," says Bundchen, who moved there from New York City to be close to her husband, who plays quarterback for the New England Patriots (maybe you've heard of him).

Whether they're having a boy or girl, these things remain clear:

• It's going to be one beautiful, adorable celebrity baby.
• Tom Brady has seen Gisele nude at least once. Jerk.