5 Seconds Of Summer stormed the stage and brought Boston to its feet on Sunday (December 15) at the Kiss 108 Jingle Ball.
The Australian band kicked off the set with "She Looks So Perfect," then pumped up the crowd with their hit "Easier."
The band is ending 2019 on a high note.
Ashton announced that Kiss 108 Jingle Ball is the "last show of the year for us as a band," before launching into "Teeth" and "Who Do You Love."
Luke, Michael, Calum, and Ashton wrapped up the night with "Want You Back" and "Youngblood."
Surprise! Longtime friend and fellow Jingle Ball performer Niall Horan waited backstage to watch his friends and greet them when they walked off.
Want more? Check out their backstage interview with Billy Costa!
Photos: Getty Images + Rachel Kaplan