21st Century Nos. 21 & 20: Lil Wayne & Bruno Mars

This week on Greatest Pop Stars, we're talking about the men in the "Mirror": Lil Wayne (No. 21) and Bruno Mars (No. 20). First, host Andrew Unterberger is joined by Kyle Denis and Carl Lamarre to talk about the pop star qualifications of the self-proclaimed best rapper alive -- the peerlessly prolific Lil Wayne -- and then Andrew and Kyle return with Trevor Anderson to discuss the immaculately curated catalog of Bruno Mars (45:40), the rare pop star without a single true flop on his resume.

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