Rihanna has yet to choose Super Bowl guest performer, could be a solo show

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Rihanna and her creative team are hard at work planning her Super Bowl halftime show and determining whether or not she will be joined by guests, with a list of nearly 50 possible names to step onto scene with her. .. TMZ learned.

Sources with direct knowledge of the plans tell us that everyone Rihanna has collaborated with over the years is likely to appear - with stars like Kanye West, Paul McCartney, Calvin Harris, Pharrell, Jay-Z , Drake and more on Rihanna's resume.

We are told that at this time, there has been no final decision on who Rihanna might join, but she will absolutely have the final say. Our sources also tell us there's still a chance she'll do all of this solo and without a guest...although it's likely she'll have at least one person, if the shows of the past few years are a indicator.

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As we reported, Rihanna and her boyfriend A$AP Rocky were spotted hitting up a New York recording studio on Monday night, so it's possible they're working on something together, maybe even for the big game.