Joel Madden & Nicole Richie on the rocks?

Socialite Nicole Richie and her rocker boyfriend Joel Madden are reportedly having problems. Although the rumors have not been confirmed, Nicole is believed to be expecting her first child with Madden. She was seen with a growing baby bumps and was photographed constantly holding something in front of her stomach. Sources believe Nicole's rumored pregnancy could be putting stress on the pairs relationship.

The couple had what was described as a vicious blowup outside a store in Annapolis. They were touring with Madden's band Good Charlotte, and they made a stop. Nicole went into a lingerie store to purchase a bra. When she came out of the store Madden exploded into a very public, very brutal tirade. Richie was described to be sitting in stunned, submissive silence.

Joel used to be a nice guy, but his temper is flying loose these days. He's overwhelmed, and he snaps because he's got a lot on his mind. He finds fault with Nicole all the time, a friend said.