I think that it is only get-away-with-able (!) if you are under 25, size 10 or under and have self supporting (and smallish) boobs. Anything other than that and it would look a bit slapperish (sorry, but you asked!).
Whoops I'm 27 and a size 12.
But I'm currently on a diet so 
Anyway I've just bought it!
Hopefully a jacket would tone down the slapperish look