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Late last week, Justin Bieber was spotted at a Hollywood recording studio with Mariah Carey, French Montana and producer Detail. It was reported that the pop superstar popped up during the session and the end result was Bieber adding vocals to an untitled track set to release soon.

Fast forward one week later, the end result is the official remix to Mariah’s “Infinity” single. Titled “Why You Mad?” the record now features French Montana, T.I. and Justin Bieber. Premiered by TMZ, listen below as the original appears on Carey’s #1 to Infinity LP.

Continue after the jump…..

Previously: Mariah Carey – “Infinity” (Video)