updated 11/12/2012 AT 8:00 AM ET
•originally published 11/12/2012 AT 9:35 AM ET
Is there a message in the music?
At his concert in Boston on Saturday, Bieber played an acoustic guitar and sang Justin Timberlake’s hit, “Cry Me A River,” a song with lyrics that describe the feeling of finding out a partner has been cheating.
It’s unclear whether or not Bieber’s song choice deliberately referred to Gomez, 20, who ended the relationship more than a week ago, a source told PEOPLE. Bieber has reportedly played the song before.