I would highly recommend this perfume by Caswell Massey called Elixir Of Love it's very popular, classy and beautiful scent, directly based off of an Victorian era formula worn by ladies of the time, literally can not go wrong with this stuff.
Like @kapakani said, I love Brittany spears fantasy naughty remix. Armani code is always a good choice but it's pricy. I like Madonna truth or dare naked, and queen by queen latifah. celebrity scents are my guilty pleasure and they're usually way more affordable.