Ali Lohan in Los Angeles, CA. April 3, 2012. Credit: AKM-GSI

Ali Lohan is getting older -- and skinnier.

Lindsay Lohan's 18-year-old sister, who signed a multi-year contract with Next Model Management last year, was spotted fetching a modest lunch in L.A. of coffee and fruit.

Showing off her recently cropped hairdo, the Hollywood teen looked noticeably pale and thinner than ever, with a tiny black floral dress that accentuated her shockingly skinny frame.

Back in December of last year, the teenager's famous "mom-ager" Dina Lohan shot down public scrutiny over her younger daughter's shrinking figure, telling Us Weekly she doesn't "read any of the rubbish" about Ali's weight.

Ali (who goes by Aliana now) said simply that has "always had a fast metabolism and is able to eat what [she] wants, from scrambled eggs with American cheese and hot sauce to Nutella."