I saw a guy use that and the girl giggled in a flattered way, but I could tell she wasn't interested. I think seems over used, false, uncreative, and it's too obvious what you're up to. I'd only use it if its slightly true and you think there's a big chance she'll like you. If she's beaming at you and furiously playing with her hair and trying to lock eyes with you and quickly darting away then you can say whatever you want as long as you're confident.