It was the worst mass shooting in U.S. history, and now we know exactly how it happened.
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Celebrity feud alert!!
While Ariana performed a medley of The Way and Problem at the iHeartRadio Music Awards, RiRi seemed to have a pretty strong opinion of it while she hung out in the audience.
In fact, girlfriend had a case of the giggles (above)!
But is that what she was really laughing at or was it just a private joke???
Watch the full video (below) and you decide!
Was Rihanna Laughing At Ariana Grande??
Total Votes: 17,139