AceShowbiz - %cJustin Bieber% surprised fans attending %cAriana Grande%'s concert in Miami, Florida over the weekend when he made an unannounced appearance onstage. However, not everything went according to his plan. The Canadian heartthrob forgot some lyrics while he joined the petite diva during the performance of "Love Me Harder".
In a video taken and shared by a concertgoer, the crowd cheered loudly when Bieber emerged on the stage after Grande finished singing the first chorus. He sang the lines originally sung by %cThe Weeknd% and that's when he messed up the lyrics.
"So I feel bad, I forgot the words, Ariana," he admitted after the song ended. "I've been trying to memorize them backstage for like an hour!" Neither Grande nor the fans packing the American Airlines Arena seemed to mind the error. The 21-year-old songbird even assured the "Baby" hitmaker that "nobody heard."
That night, the two pop superstars also joined forces to perform Bieber's own hits. They sang "All That Matters" and "As Long as You Love Me". During the performance of the latter song, Grande tackled the verse rapped by her boyfriend %cBig Sean%.
After the concert, Bieber took to Instagram to post a photo taken during the show and apologize for the incident. "Had fun with u Ariana, even tho I forgot all the words haha," he wrote.