Stargate produced diamonds and the guy who produces katy's songs helped.
Rihanna had a photo with Stargate in the studio. She just never met the other guy.
Producer: Benny Blanco, StarGate, Kuk Harrell
Quote:
Q: Have you spoken with Rihanna about how well the song is doing?
Benny Blanco: I have never even met her! It’s so weird how music works right now…I don’t even know if we've ever been in the same room as each other. So, Hi Rihanna!
Phresh Out The Runway 9/10
Diamonds 10/10
Numb 9/10
Pour It Up 9/10
Loveeeeeee Song 10/10
Jump 10/10
Right Now 4/10
What Now 0/10
Stay 10/10
Nobody's Business 10/10
Love Without Tragedy / Mother Mary 10/10
Get It Over With 9/10
No Love Allowed 9/10
Lost In Paradise 9/10
I thought Rihanna never met Calvin before the video shoot? Am I wrong
I think it was the VMA's. He did an interview about a year after the song was released, and said they'd never met formally at that point. I could be wrong about the time period, but yeah.
Thought y'all was gon change for Black History Month. 
