Ariana Grande surprises fans with Justin Bieber appearance on her concert

On Saturday night in Miami Ariana Grande gives the ultimate surprise to her concert crowd with a special appearance from Justin Bieber.

The 21-year-old singer stepped out to perform three songs with Ariana – “As Long As You Love Me,” “All That Matters,” and “Love Me Harder.”

“Had fun with u Ariana, even tho I forgot all the words haha,” Justincaptioned the photo on his Instagram account.

“Great night. Loved being back on stage. Miami I’m not done yet….” he added on Twitter.