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On tonight's all-star lineup for Grammys performers is an unlikely trio of Bruno Mars, Rihanna, and Sting. It's a highly unusual grouping but that seems to be the name of the game tonight. Ed Sheeran and Elton John anyone? 

If Sheeran and John set the tone for unusual pairings though, this trio will kill it. 

We'll have to stay tuned to see if Rihanna, Sting and Mr. Bruno Mars give Sheeran and John a run for their money. 

The night has just begun.