“Rock Star” is an unreleased cut from Future‘s Honest album that didn’t make it due to sample clearance issues. The sample in question is George Michael’s “Careless Whisper”, which DJ Clue inserted into his production here. Nicki just has one guest verse — the intro — but the highlight of this track to me is Future’s melodic hook. One of his better, smoother ones IMHO.
Song since removed.