What a surprise!!!!
RiRi shocked concertgoers at a pre-MTV EMA party in Madrid on Saturday night by showing up during Bon Jovi's set and joining them on stage for a duet of Living On A Prayer.
Afterwards, Rihanna took to her Twitter to say, "Wait!…did I just rock out with Bon Jovi tonight??? WTFFFF!!!!!!!"
Check it out (above)!
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