Attention all Beliebers and Arianators!
"Congrats @arianagrande on your number 1 song #arianabeiberduet??" the Biebs playfully posted on his photo-sharing site.
In the pic, the pop star is seen posing in the opposite direction of Grande, wearing a plaid short-sleeved shirt and a brown fedora.
Grande spilled some more of the details during On Air With Ryan Seacrest this morning and admitted that she's finally hit the recording studio with her longtime pal and mentor.
"I'm excited about it, I'm just very excited," she said.
"Justin wrote it and brought the idea to me and I was really excited to hear it and I'm excited to work with him. I've wanted to work with him for a while."
Grande continued, "I know it's something our fans have been begging for for years now."
And when asked when we can expect to hear the pop tune on the airwaves, Grande said, "I'm hoping it ends up on my album, which will be out late summer."
It was a busy few days for the Biebs (although when is it not?!) because he also posted a picture of himself on Instagram getting some pampering with Floyd Mayweather.
The professional boxer is gearing up for his welterweight unification fight on Saturday at the MGM Grand Garden Arena against Marcos Maidana and appeared to be enjoying his downtime with the singer.
"We call this the good life," Mayweather is overheard saying in the Instagram video that shows Biebs getting a massage while he receives a pedicure.
"#Moneyteam spa. Getting ready for the fight," Bieber captioned the clip.