Jennifer Aniston was so mortified by Chelsea Handler's dig at her nemesis Angelina Jolie that America's sweetheart has decided to distance herself from the loudmouth comedian and keep her at an arm's length.

"Jen and Chelsea haven't officially fallen out but they certainly won't be going on vacation together for a long time unless Chelsea promises to never talk about Angelina again," a friend of Chelsea's tells me. "She understands that what Chelsea did was out of loyalty, but it didn't help. In fact, it made things worse."