Jesse McCartney, who the Jonas Brothers opened for back in 2005, came out on stage for the second time this tour in Boston. "We just thought, you know what, we gotta let Boston get the extra special experience tonight. Please welcome to the stage, our friend, your friend, Jesse McCartney," Nick Jonas introduced as the singer came on stage.

Other surprises that came during the Jonas Brothers’ Boston concert were guest performances by Dashboard Confessional, Marshmello, Jesse McCartney and JoJo, as well as appearances by the brothers’ father Kevin Jonas Sr. and Red Sox mascot Wally the Green Monster.

Kevin Jonas surprised fans in Boston by debuting his solo song, 'Changing,' during the Jonas Brothers' 'Greetings from Your Hometown Tour.' This marked his first solo performance apart from the band,