Cameron Diaz Halloween party costume cash money pants leather car shots kiss laughing

Cameron Diaz got in the Halloween spirit over the weekend -- in what appears to be a makeshift stripper costume!

Diaz gave a subtle nod to women of the pole by tucking dollar bills into her belt. Cameron is 39, so we appreciate that she acted her age and didn't go the slutty route!

The newly single actress hit up a few private parties in Beverly Hills, where she seemed to be over former love Alex Rodriguez. Diaz and the professional baseball player broke up about a month ago.

She even flirted with a fella at the party -- check out a pic of the encounter after the jump!