Panel one: "Candace, why are you being so negative?" Snork. I think the word we're looking for is "realistic", Liz. And Candace is forced to defend herself.
Panel two: ...WHAT IS THAT FACE LIZ IS MAKING? WTF? XD Is she snorking up whatever is in that plastic container (gonna recycle it?)? XD Wtf. Meanwhile, Candace continues to be realistic, and Liz says she's "different". "Different" here meaning "exactly the same, except worse".
Panel three: That would be more believable if you hadn't TOTALLY FAILED AT IT AND MOVED BACK INTO YOUR MOTHER'S HOUSE. WOMAN. You are a TOTAL HYPOCRITE. I cannot even--dear God! And you so have not "grown up".
A positive thing: I love the way Candace is holding Shiimsa. Next she'll put her on a pole and barbeque her over an open fire. Awww. ♥
Panel four: Groooooan. See above comment. Liz is not grown up. She does not know who she is, unless she means that one strip where she said "I'm STUPID". Creepers.
Also, ewww, eating face. That's icky and kind of undermines the punchline--UNLESS. Unless who she is is... (drumroll) HER MOTHER.
Somebody insult this stuff coherently. I can't. It hurts too much.
EDIT: Apparently that's chips and dip. Sure as heck doesn't look like it.