Wiz will join fellow Pittsburgh MC Mac Miller on ‘RapFix Live’ Wednesday at 4 p.m. ET on MTV.com By Rob Markman Wiz Khalifa Photo: Jason Merritt/ WireImage There’s going to be a Pix Burgh party on Wednesday’s “RapFix Live.” Mac Miller isn’t the only Pittsburgh rapper making his return to the red couch tomorrow, as Wiz Khalifa will also be sitting with host Sway Calloway to talk about his latest and greatest. It’s perfect timing too. On Monday, Khalifa released “Work Hard, Play Hard,” the first single from his sophomore album O.N.I.F.C. (Only N—a in First Class). The catchy track, which was crafted by Stargate and Benny Blanco, finds Young Khalifa flaunting his success in the face of less fortunate haters. Wiz is coming off the heels of his critically acclaimed Taylor Allderdice mixtape. He’s prepping O.N.I.F.C. for an August 28 release, and if that wasn’t enough, Mr. Khalifa and fianc
