LeAnn Rimes doesn't appreciate others talking about her weight ... especially E! host Guiliana Rancic.

In a recent interview, Guiliana, 36, said the following about LeAnn:

    "She lost a lot of weight from all the stress in her life. She seems a little thin right now, and I think she looks great when she's a bit curvier."

The country singer, 29, responded to Rancic's statement. LeAnn Tweeted:

    "@GiulianaRancic hey, we should go to dinner sometime. You get criticized all the time for how small you are. You can see just HOW much I eat and maybe put a stop to this crazy "shrinking" once and for all.....oh, & then we should workout together! Good luck with your restaurant!!!!"

Rimes added, "I just don't appreciate her comments. So I really would love for her to hang with me, see who I am. I am a person, you know."