Justin Bieber and Ariana Grande

Justin Bieber and Ariana Grande Announce Duet

The secret is out. Two of music’s biggest pop stars, Justin Bieber and Ariana Grande, are teaming up for a duet.

Rumors started after Bieber posted an Instagram photo of him in the studio with the Nickelodeon star. “congrats @arianagrande on your number 1 song. #arianabieberduet ??” he said.

After it became a trending topic, Ariana confirmed the rumors, tweeting, “thank u justin!! secrets out now.”

Their collaboration could appear on Ariana’s sophomore album, due in August. The follow-up to last year’s Yours Truly features production from Zedd, Benny Blanco, Ryan Tedder, Key Wane, and Rodney Jerkins.

Meanwhile, her single “Problem” featuring Iggy Azalea is expected to make a big debut on next week’s Billboard Hot 100 after selling over 300,000 downloads. A video was recently shot in L.A. with Iggy and Big Sean.