Interspersed among Wiz Khalifa's chart-storming club tracks, you'll find the rapper's other moods: the after-hours album cuts that mesmerise with his loping, deceptively easy-going flow ("Rooftops"), the steamy slow jams ("Promises") and the smoke-filled joints with the addictive hooks ("Medicated"). Early works like 2006's "Pittsburgh Sound" find him throwing back and flexing Golden Age muscles.