Sia Performs "Elastic Heart" on 'Ellen', An**unces Grammy Performance & Four **minati
 

The lineup of Grammys 2015 performers is starting to get starting to get stacked. **t only will Lady Gaga, Ariana Grande, Madonna, Ed Sheeran and plenty more set to be on hand for this year's ceremonies, but a**ther new performer has been an**unced. Today (Jan. 30), after giving yet a**ther stunning performance of her new single "Elastic Heart" on Ellen, the "Chandelier" singer an**unced that she will be bringing her cinematic stage act to this year's Grammys ceremony.

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