The Argyros Plaza at Segerstrom Center of the Arts in Costa Mesa will present the Coollab Festival, an evening of performances by artists from Orange County's hip hop scene.  Artists on the bill include Alaz, Rocky Angelini, Apollo Beepop, Weapons of Mass Creation, and more.   The festival will take place on Saturday, July 20th at 4:30 pm, and is free to the public.  For more information visit www.scfta.org/events or follow @thecoollabproject on instagram.