Elisha Cuthbert: Thin

Super thin works when you're playing an ex-porn star ("Girl Next Door") or a mad killer's prey ("House of Wax"), so Elisha looked the part.

Renee Zellweger: Chubby?

Renee famously gained 28 pounds to play the chubby British heroin Bridget Jones film series. She allegedly ate pizza and donuts to reach her goal weight for the first movie but ate healthy foods for the second.

Renee Zellweger: Thin

Renee plummeted to an unhealthy looking size to play Roxy Hart in "Chicago" between the first two Bridget Jones movies. By her current looks she must be wearing a fat suit for the third installment.

Kelly Osbourne: Chubby?

Kelly Osbourne told US Weekly that she, "took more hell for being fat than I did for being an absolute raging drug addict. I will never understand that."

Kelly Osbourne: Thin

Kelly stayed in shape after her "Dancing with the Stars" near-victory and has lost a total of 42 pounds the healthy way — exercising and eating right. A novel idea, indeed.

Nicole Richie: Chubby?

The words Nicole Richie and chubby really should never be in the same sentence together. Clearly the socialite is still rail thin, but downright plump compared to the stick figure from previous years.

Nicole Richie: Thin

Nicole once got so skinny that the rumors were flying about eating disorders. She denies the gossip, but when you can see a girl's rib cage, clearly concerns for her health are not unfounded.

Kelly Clarkson: Chubby?

The original American Idol, Kelly Clarkson, is constantly under the microscope for her fluctuating weight. Kelly has always claimed to be happy in her own skin.

Kelly Clarkson: Thin

Kelly was at her thinnest when she won two Grammy's in 2006, but she once told Self magazine, "My happy weight changes. Sometimes I eat more; sometimes I play more. I'll be different sizes all the time."