The pop star made an unscheduled appearance during the Colombian singer's show at the venue to perform their collaboration Sorry.

Justin brought Balvin onboard to record a Latino remix of his hit song last year (15), and the Baby star returned the favour by supporting him at the L.A. gig.

"Had to support my bro @JBALVIN tonight at Staples. We got more coming," he tweeted. "Nothing like the rush of the stage."

Balvin also shared videos of the performance on his page, calling the performance a historic moment for Latin music, adding, "Dream big!"

The pair's reworked version of Sorry was released in November (15), and Justin announced the track in a video posted online, declaring, "The Latina girls are gonna go crazy."

Justin and Balvin met at the Special Olympics World Games Opening Ceremony in July (15), and they bonded backstage as the Colombian star attempted to teach the Canadian some Spanish.