The 23-year-old pop star, who's due to give birth this fall, says she's been battling "horrible" morning sickness and dealing with hormonal swings that have caused her to lose her temper "like twice." But otherwise, Spears says, she's in "nesting mode" and finds being pregnant "empowering."
"I think it brings out a pure side of you," she says.
After first seeing a sonogram of her baby, Spears was speechless.
"You can't really say anything. I was emotional. I think it's the best feeling in the world."
Spears says that she hasn't yet tried to find out whether it's a boy or a girl. She wants three children — and doesn't plan to return to her day job soon.
"I'm sure there's going to come a time when I get back to work again, but it'll be a totally different way of life than it was before," she says.
Spears and her husband, Kevin Federline, are starring in their UPN reality show, "Britney and Kevin: Chaotic." The six-episode series features pre-pregnancy home videos of the couple's dating, engagement and wedding.
"It's so different for me, doing something like this," said Spears of the show. "My friends think it's cool."