Tucked, and please do keep the necklace.

I'm on team Brooklyn.

I like the necklace, to echo the black, but I do think one that is less busy might be better, given the pattern in the skirt. This one would work really well with a plain black skirt.

Thanks everyone - seems about half of you voted for tucks, and half for the Brooklyn look. I personally do prefer the latter, for I don't really see a waist when it's tucked in, (I feel like a pencil with that stripe around it) but I can see it when the top kind of settles in it.
Skylurker - it is body con, and I'd probably not wear it for a meeting or presentation, but I don't think it's that bad. The sleeve detail seems to reflect that it's meant to be shown.