I got a lovely Warehouse Spotlight dress in sales today. £18 down from £80! 
it has a criss cross sort of back at top and sequins.
HOWEVER, and this is my downfall - I have large norks (28FF to be precise). bra question comes into play. what could/should I wear? I have a strapless one but maybe not as low cut as it should be.
my friend swears by Rigby and Peller bustiers - should I invest in one?
I used to have and am thinking of a sheer camisole thing so I could maybe hide the strapless bra if it did show.
any other ideas? thanks