Amid rumors that Rita Ora was writing a revenge song possibly for the Fifty Shades of Grey soundtrack, the singer showed off what her ex Calvin Harris was missing this weekend at the V Festival.

Why Rita Ora Didn't Perform At Teen Choice Awards

On Sunday, Ora showed off her abs on Instagram in a pearl covered bra top. She wrote, "V Fest 2 day! We ended it on a high!! Yes to being the best crowd ever! And Katie Eary again customised another outfit! We love you!! #PEARLSPEARLSPEARLS".

The Mirror reported last week that Ora was writing a revenge song comparing an ex-boyfriend to the devil. After a bitter breakup with Harris, many are speculating that it could be about him.

Why Rita Ora Isn't 'Great' Despite 'Fifty Shades' Success

The song is reportedly called Poison and the lyrics include such statements as "Like a serpent/From the Garden of Eden/You are like poison/Running in my blood."

Harris recently blocked Ora from performing her song I Will Never Let You Down at the Teen Choice Awards. "For anybody who doesn't understand how it works, he wrote and produced the song," Ora told Ryan Seacrest about her song. "So he has to approve anything TV-wise for anybody who doesn't get it. And obviously he owns the rights to it and he didn't approve the Teen Choice Awards."

"You know, you write a song with somebody, and I guess there's some stuff that comes with it," she said. "Everything happens for a reason, that's how I look at it." Harris then tweeted, "You'll only know 1 side of the story RE Teen choice awards because I choose not to talk to the papers about every aspect of my personal life But just know I had a damn good reason".

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Rita Ora, Calvin harris, Fifty Shades Of Grey