Ariana Grande and Justin Bieber duetRumors of an Ariana Grande and Justin Bieber duet have been confirmed, after Ariana retweeted an Instagram pic that Justin shared. The photo shows the singers in the recording studio, so we guess this is really happening!

Justin wrote "congrats @arianagrande on your number 1 song. #arianabieberduet"

Ariana tweeted "thank u justin!! secrets out now."

You could say that. And now we want details. Song title? Release date? Ah well...before long they'll be teasing snippets and counting down the days.

Check out Ariana's iHeartRadio Music Awards performance of "The Way" and "Problem" (we still can't get over Rihanna having a giggle over Ari's dance moves). As usual, Ariana's voice was flawless.

Are you looking forward to the Ariana and Biebs duet? UPDATE: Ariana told Ryan Seacrest this morning on his radio show: "I'm excited about it. Justin wrote it and he brought the idea to me. And I was really excited to hear it and I'm excited to work with him." She added, "I've wanted to work with him for a while. And I know it's something our fans have been begging for for years now."
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