I like the green dress this afternoon much more than the beige one this morning, that just didn't look right. I think her problem is that belts aren't great if you're short waisted, they don't slim you, rather, they add bulk and don't necessarily sit in the right place. I have the same problem but for the opposite reason, I'm long in the waist so ore often than not the belt is not on my natural waist and is just annoying as it doesn't sit right, even with things like dressing gowns.
Meghan reminds me of my SIL who also has very slim legs jealous but a short, boxy torso. The two bits of her body aren't evenly matched so she ends up looking a bit dumpy sometimes, even though she really isn't (my SIL is about 5"2 and wears a 2.5 shoe!) it's just that with super skinny legs, she's not balanced quite right so looks bigger body-wise than she actually is. I used to have the opposite problem, in that I have rather chunky legs (even when I'm skinny), but a slimmer body, which is harder to work with in my experience...I'd love slim legs!!!