LeAnn Rimes gets plenty of flack for her skinny bod, but hubby Eddie Cibrian is not only coming to her defense ... he's calling her "perfect."

Cibrain told Extra:

    "I think she looks wonderful. She is very healthy, and, to me, perfect."

OK, we have to admit -- that's cute.

LeAnn has also been getting some backlash on Twitter for her stepmom status -- see what one follower said, and how LeAnn responded, after the jump!