TORONTO - Alanis Morissette says news of her pregnancy came as a surprise.

The Ottawa singer appeared on the late-night chat show "Chelsea Lately" on Wednesday night, just hours after she announced that she and rapper husband MC Souleye are expecting.

Morissette, wearing a black suit and heels, told host Chelsea Handler that she didn't realize she was pregnant when she went to the doctor.

"No, I actually thought I wasn't," the 36-year-old said. "I just sort of in passing had said I was a little late. And he said: 'Is that normal?' And I said, 'No, that's not really typical for me.' ...

"I was very happy."

Morissette still wasn't convinced, however.

"I said, 'There's still a chance that I'm not though, yes?'" she recalled. "He said, 'It's about as likely as my getting a sex change.'

"And I said, 'So when are you getting a sex change?'"

It'll be the first child for Morissette, who married Mario Treadway in May (this prompted Handler to crack: "Now, you got married recently to a rapper — so it doesn't take long for them to impregnate women.")

Morissette, whom Handler said was five months into her pregnancy, grinned throughout the interview, whether discussing her personal life or riffing on Canadians — "We're very friendly, but we're also passive aggressive," she said.

She also recalled her initial meeting with Treadway.

"I had a ceremony at my house, a little meditation ceremony, and he came over, and he walked in and I thought: 'Wow, he's incredibly sexy,'" she explained.

"But I had no idea what was to come of our little connection."

Morissette held court on a number of other issues during the chat, including her ongoing acting stint on the TV show "Weeds," her stance on marijuana ("I don't have a stance on it, I enjoy it sometimes, not while I'm pregnant obviously," she said) and the book she's writing.

"It's a very stream of consciousness book, philosophy, tons of Q-&-A, spiritual, anecdotal storytelling," she said.

"It's not a memoir. I have no desire to rehash and tell the story of my story, ever."