@aidan I haven't found a way to annotate which of this songs are in which time signatures yet, but there are a few 5/4s on this playlist and even one 15/8. https://www.youtube.com/playlist?list=PL1g-GXFBtDQff-l_sdmSX44NHPB7r4HoO
Like @SallyStrange said, 99.9% of hip hop is in 4/4. When folks deviate from that, it's often by just dropping in an extra beat. Or in the case of Outcast's "Hey Ya", adding a 2/4 every now and then.