Kristen Bell isn't shy about talking about rear ends. In fact, in the April issue of Women's Health fans can learn how to get a butt just like hers that "defies gravity."

She tells the magazine, which hits newsstands March 13, about working with her fiance Dax Shepard, her "House of Lies" co-star Don Cheadle's butt, and her thoughts on going vegan.

The actress says about butts, "My favorite things on the planet. I want two round cupcakes, always. I kicked my buns and abs sets into high gear when I knew I'd have to be in my bar and underwear on House of Lies. But I don't show my crack! All the Mr. Skins of the world are like, "Ooh, Kristen gets naked!' I'm like, ‘Dream on!'"

So what does she think of Cheadle's tush? "If you had those beautiful chocolate bun-cakes, you'd show'em too, let's be honest," she said.                        

Kristen loved working with Dax on their upcoming movie "Outrun": "I would watch him walk back to the monitor and yell things such as 'Action!' or 'Cut!' and I'd just go, ‘And you expect me to work when you're doing cute things around me all day? How am I supposed to focus?

But can Dax cook? She explained, "He makes this delicious spaghetti dish… about twice a year. I wish he cooked more.[Actually] I don't wish he cooked more. He's a very good cook, but I'm quite territorial in the kitchen. It's like, if I went outside and fixed the car, he'd be like, ‘Whaaat?'"

As for vegan food: "[It's] fart powder. [It] makes you gassy," she confessed.

Kristen on Dax Shepard best friends: "We decided to create the first four-way marriage, where our couple has married their couple."

Kristen on her relationship with fiancé Dax: "We nauseate ourselves with how mushy we are."