Kristin Cavallari exercises to gain weight

'The Hills' actress Kristin Cavallari does not want to look her skinny self and has been working out to gain some muscle.
Cavallari, 28, lost 20 pounds after she gave birth to her second son, Jaxon Wyatt, who is now eight-months-old, reported E! Online.
"I try to work out four or five times a week and I eat incredibly healthy. I'm the kind of person who doesn't eat toxic chemical. I just try to eat real food. I think probably the best tip is that I try to always get a vegetable in somehow, even in the morning if you're making a smoothie," she shared.

"After I had children, my body literary changed. And now for me, it's about trying to keep muscle, so that, yeah, I don't look to thin. Because I have no curves, I can look really skinny and I don't like that look," she said.