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Professional instigator Demi Lovato appears to have sided with Calvin Harris in his lonely Twitter war with ex-girlfriend Taylor Swift.

“This is more than a song,” Kesha captioned the clip.

"It's time to light the flame, right before it rains," Kesha emotionally belted alongside Zedd.

Maybe Selena can't quite quit that same old love after all.

"Clarity" from Zedd can be found on his debut album of the same name, Clarity. Zedd is a Russian/German electronic dance music producer. The female vocals come from the singer known as Foxes.