Uh oh -- is Mischa Barton the next Jessica Simpson after wearing a pair of unflattering jeans?

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Barton, 24, showed off her curves in super-tight, pale yellow denim, bright red shoes and a midriff-baring top while on a Starbucks run Sunday afternoon.

Pointed out, "Mischa Barton was out and about, dressed like this. Showing off her flabby belly... Mischa should probably rethink that Starbucks, eh?
noted that the Barton "pour[ed]  herself into stretchy banana yellow high-waisted pant bottoms, a belly baring floral top and a pair of Wizard of Oz red pumps in L.A. this weekend. Not matching is the new black." called the "belly-baring top...unflattering," and PrimaryBeats captioned a photo, "OMG What happened to her? Check out poor Mischa Barton being a mess and showing her extra body weight while going out to get some coffee at Starbucks. [Her short-lived CW drama] The Beautiful Life should've never got canceled!"

Last Thursday, highlighted her "softer, more voluptuous look" as she ran errands in Beverly Hills.

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Barton has faced criticism for her weight ups and downs throughout her career.

"One minute, I'm too fat, the next I'm too skinny," Barton told Celebuzz in a statement in February 2009 -- after she was slammed for "wasting away" by a tabloid.

She credited that slim down to "watching what I eat... I still love my Pilates and yoga and I have cut back on fatty foods a bit... I'm happier and healthier than ever!"

By July 2009, she was blaming her newly plumped up face to wisdom tooth surgery. (She also blamed the surgery for her being hospitalized under a 5150 psychiatric hold that same month.)