Photographer Brette-Ashley shared a heartwarming video of her daughter dancing to a Taylor Swift song she heard on a bus.

Emerson jammed to “Shake it Off” by Taylor Swift, when she heard it playing on the bus in Orlando, and let the driver know how much she loved the song.

“Favorite moment from our trip so far,” Brette-Ashley captioned the video.

“Before getting off the bus Emerson went up to our bus driver and said ‘this is my favorite song’!!!”

The driver turned up the volume and also joined in dancing his heart out with a big smile on his face, all while remaining seated. Emerson, wearing a cute black-and-white dress that twirled as she danced, gave an impromptu performance alongside the driver.

The Rochester, New York-based photographer was moved by the driver’s kindness and enthusiasm toward her daughter.

Now the video has gone viral, with over 2.6 million views. “My phone is blowing up … apparently this video of Emerson is going viral all the sudden!!!” Brette-Ashley wrote in a Feb. 21 Facebook post.

“How crazy would it be if @theellenshow @taylorswift could track this amazing guy down for spreading so much joy,” she wrote.

Viewers too have become detectives and are trying to crack the case by helping identify the driver. Brette-Ashley gave them some clues to help, like the family had been in Orlando, Florida, and were returning from Sea World when they met the driver.

One Facebook user named Tara Duprez gave Brette-Ashley a name with a link that has since been deleted. “His name is Fred,” Duprez wrote on the photographer’s post.

Brette-Ashley told her she sent Fred a message, which could see the puzzle getting solved finally.

Nevertheless, the pure joy of a little kid on hearing her favorite song play and the willingness of an adult happy to play along, has certainly warmed thousands of hearts all over the country.