A: "Got Your Money" by Ol' Dirty Bastard featuring Kelis.
You'll laugh and she'll laugh and she'll realize how silly she's being and how good she has it with you she'll hand over the money. Then she'll give you a hug, and a kiss on the cheek, and, if she has time, maybe a quickie behind the dumpster.
Of course, you should only play this song if she actually has your money.
If she doesn't, or you think she's holding out on you, you should probably keep fighting. How else is she going to learn? She's been on that corner for four hours, she's gotta have some money.