What bra for v-necked dress with spagetti straps?

[create]

Strapless bras show in the middle at the bottom of the V, although it's not that low. It really needs a standard plunge type bra, but then the straps will show....

I've got this one Here

With a strappy top you would remove the straps and wear it strapless (or with see-through straps). The middle bit is see-through so you shouldn't see it with a V - neck unless really staring! I'm testing mine out at a wedding next weekend!

Ah thank you, that's what I need