Amber Rose was often spotted heading to a gym before she became pregnant, and her workout regime doesn't seem to be slowing down even though she is 31-weeks pregnant.

The video-girl-turned-model tweeted a photo of herself, along with her two dogs, after a hike up Runyon Canyon in Los Angeles.

"Runyon Canyon with all 3 of my sons :-)” read the photo caption. Rose, 28, who is engaged to rapper Wiz Khalifa, 25, was dressed in all black with a pink cap and pink sneakers.

Rose, who usually has blonde hair, has stopped dying it since announcing her pregnancy; she showed off her cropped natural black hair in her photos.

In one photo, that she tweeted at 28 weeks, all that is visible is her large stomach and thighs, making it appear that she is naked; however, Rose quickly pointed out that she is, in fact, wearing clothes.

“I swear I have shorts on in this pic but my belly is so big u can't see them Lol,” the caption said.

Rose and Khalifa publicly announced her pregnancy at the 2012 VMA Awards. On the red carpet, Khalifa told MTV's Sway Calloway: "We're expecting a beautiful lil baby -- me and Amber. We're so excited. We're having a baby!"

The couple in September gave their first interview since the baby news to XXL magazine.

“I’m so ready. I’m going all-natural. I’ve decided that I’m going to have an all-natural water birth. No medicine. I want those bragging rights! The next time Wiz has a stomach ache or anything, I’ll say, ‘I popped out a baby all-natural,’” she said in the interview.

Rose also told People magazine in September, "We do know the sex, but we're [keeping it private] for now. We just found out two days ago, so we're super excited.'" It has since been disclosed that they are expecting a boy.

Rose has dated rapper Kanye West. The relationship ended after she accused him of cheating on her with his current girlfriend, Kim Kardashian.

After their split, Rose said she found love with Khalifa; they have been engaged since April.

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