Look who's back in the studio with Lady Gaga ...

  

   Lady Gaga Back in the Studio with RedOne

Lady Gaga and producer RedOne are working together again, as the pop star posted an image of the two of them in the studio on her Instagram account Thursday.

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RedOne produced the biggest tracks off Gaga's 2008 debut, The Fame, including hits "Just Dance," "Poker Face" and "Love Game." He continued working with her on her followup album Born This Way in 2011 on a number of tracks, including "Judas."