Adam Levine, Blake Shelton, Gwen Stefani, and Pharrell Williams graced "The Tonight Show with Jimmy Fallon" to play the game "Spin the Microphone."
The game is pretty much like "Spin the Bottle" but with a twist. Each of the judges' names, including Fallon, were on the table and a microphone was placed on a spinning platform.
If the mic stops on one of their names, the judge will pick a card that contains a song. The person has the choice if he or she will sing it or pass it onto another person.
The mic first pointed to Fallon but instead of singing the song, he passed it to the Maroon 5 frontman to sang Britney Spears' "Oops!...I Did It Again," Popsugar reported.
For the next spin, the mic pointed to Stefani who also passed the song to Shelton. The country singer had no choice but to sing "YMCA" complete with choreography!
Next was Pharrell who sang "It Takes Two" with the host. Both of them nailed the rap song much to the audience's delight.
For the final song, Stefani seemed to serenade Shelton with Drake's "Hotline Bling" while the latter said nothing but "bling" during the performance.
According to Parade, the two judges seem to "flirt up a storm" during their song number.
There have been rumors that the two have gotten closer to each other after their respective divorces with spouses Miranda Lambert and Gavin Rossdale.
Hollywood Life reported that Stefani and Shelton flirt like crazy and the crooner would make the rocker laugh so hard!
But with Christina Aguilera returning for the 10th season of "The Voice" the growing friendship of Stefani and Shelton will be put the test if it's real or just for show.
Watch the fun video below!