Justin Bieber and Ariana Grande could be teaming up for a massive world tour together, according to the New York Daily News. Nothing is finalized quite yet, but both Grande and Bieber want to make the tour a reality.

"The whole thing will hopefully end in several (U.S.) stadium dates with special guest Ariana Grande," an insider says of the possible tour. "This is in the very early stages but serious conversations are taking place."

During the tour, Grande and Bieber would both sing their own solo hits and then team up for a couple of duets. Bieber was a guest at a couple of shows during Grande's "Honeymoon Tour" in Los Angeles and Miami, according to Hollywood Life. Bieber and Grande performed her song "Love Me Harder" and his song "As Long As You Love Me" during his appearances.

"There is a ton of crossover in their fan base," the source continues. "If it does happen, it will be the top tour of 2016, pulling in hundreds of millions for the two singers."

The news of a possible tour comes after Grande performed a special rendition of Bieber's latest hit song "What Do You Mean" at a tour stop in Houston.

Check out Grande's take on Bieber's hit song below!