Are genetics the root cause of musicality? It's a much-debated idea, but after our exhaustive research of sibling bands, we're convinced it could be true. In today's video roundup, we're celebrating National Sibling Day by bringing some lesser-known sibling bands to the forefront and, man, are there a lot of them! We all know the classic sibling groups like The Jackson 5, Hanson, The Bee-Gees, Haim, Tegan & Sara and Oasis, but did you know that Cayucas is a twin-brother duo or that Bleached consists of sisters Jennifer and Jessica Clavin (I wonder how many more J names are in that family)? Let us introduce you to the artists we've had the pleasure of hosting at KEXP who have turned their art into a family affair.