These two pop stars wanted to appreciate some good music together.
According to The Hollywood Reporter, Bieber was taken to the concert by his guitarist and musical director Dan Kanter, a devoted fan of the band who has been trying to get Biebs to a Phish show for quite some time.
Justin, Selena and Bieber's crew headed backstage after Phish's first set to meet the band (and their family members) during intermission. Once the second set started up, Biebs and Selena helped get the crowd going by tossing glow sticks to all the fans.
Sounds like a pretty eventful Wednesday night.