I'm not sure about pimping a butterfly but Kendrick Lamar certainly knows the smooth. Sampling and influenced by the '70s greats of Parliament, Clinton (George not me) and Marvin Gaye, he twists black anger into new and danceable shapes. Challenging at times but a remarkable follow up to 2012's 'Good Kid, M.A.A.d City' and a key album in Compton's strong hip hop legacy.