What is the name of this Rap/R&B song?

I don't listen to Rap or R&B at all so I have no clue who the artist is. I heard it on the radio today and it had this really neat riff in the background (very faint). The only lyric I can remember was something along the lines of "Get that cash" but it could be anything. I wanna say a girl may have been singing in it but I was more interested in the guitar part to take notice. Even an off the wall guess would be appreciated as I have already lyric searched it and came up with nothing even remotely similar sounding. Thanks in advance!