Ariana Grande sang with a fan while the two were side by side in separate, moving vehicles. The pop singer was riding around Paris before going live onstage for her Honeymoon Tour when two fans on a scooter rode up beside her.

While their vehicles were moving, the two sang together to Ariana's song, "One Last Time." The scooter driver tried to keep up with the singer's vehicle, and the rider on the back sang "Be My Baby," "Hands On Me," and "Cadillac Song" along with Ariana.

The duet caused a bit of traffic, and several cars started honking for the driver of the scooter to move along. This prompted the singer to yell, "Shut up!" at the honking driver.

Meanwhile, the fan, who was clearly overcome with excitement at seeing her idol said, "I'm going to cry!"

The singer is currently in Europe for the latest leg of her The Honeymoon Tour to promote her second album. She is expected to make her next stop at the Max Schmeling-Halle in Berlin, Germany, on Tuesday, May 19.

Aside from promoting her album and going on tour, the singer found time to tape a couple of episodes for the newest series, "Scream Queens," about a college sorority that is being stalked by a serial killer out for revenge, because of something horrible that happened 20 years ago.

Show creator Ryan Murphy shared that the inspiration for the show were "'80s/early '90s slasher genre" movies. The series is being topbilled by Emma Roberts, with a star studded cast that also includes Lea Michele, Keke Palmer, and Nick Jonas.

It turns out, the singer is a big fan of Murphy's other TV series and that convinced her to sign up for "Scream Queens." "I met [Ariana] and she had been a big fan of 'American Horror Story'" Murphy shared. "I pitched her the show, which she loved."

"We have to carve out amounts of time for her but I love her," he continued

Watch Ariana singing with her fan here: