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Justin Bieber surprises Ariana Grande on stage

ShowbizBy Sunday World
Justin Bieber surprises Ariana Grande on stage

Justin Bieber surprised Ariana Grande on stage at her Honeymoon tour in Miami on Saturday (28.03.15).

The 21-year-old singer rocked up at the American Airlines Arena unexpectedly to perform her hit 'Love Me Harder' with the brunette beauty but was left red-faced when he forgot the words.

After the song, Justin apologised for his blunder, telling the audience: "I feel a little bad, I forgot the words. Ariana, I've been trying to memorise it backstage for like an hour."

He added while giving Ariana, 21, a hug: "Can you guys forgive me for forgetting the words? I feel terrible."

But it seems Justin couldn't stop thinking about his mistake as he took to his Instagram account later on to share a photograph of himself on stage with his arms wrapped around the 'Bang Bang' hitmaker and wrote: "Had fun with u Ariana, even tho I forgot all the words haha (sic)."

The 'Boyfriend' hitmaker's embarrassing mishap didn't seem to bother the 21-year-old starlet as she took to her Twitter account after the show to thank him for his performance.

She tweeted: "thank u miami babes and thank u @justinbieber!!!!!! (sic)."

She also shared a video clip of her and Justin singing his song 'As Long As You Love Me,' which usually features a rap from her boyfriend Big Sean.

Alongside the footage of her rapping her beau's part, she said: "rapping my baby's verse @bigsean with @justinbieber last night at my show (sic)."