Did Justin Bieber Suffer Memory Loss? Duet With Ariana Grande, An Epic Fail! [WATCH FULL VIDEO]

Uh-oh! Did Justin Bieber suffer memory loss? On March 28, the Canadian singer took Ariana Grande's Miami concert by storm when he made a surprise appearance. But what's more shocking was when he totally forgot the lyrics on their duet song.

Ariana Grande's fans went crazy as Justin Bieber stepped on stage during the "Break Free" singer's concert in Miami over the weekend. The whole crowd broke out screaming as they sang a sexy rendition of one of Grande's hit song, "Love Me Harder." However, the 21-year-old "Beauty and a Beat" crooner messed up the lyrics and was forced to make up his own adlib, Hollywood Life reported.

Regardless of the fact that Justin Bieber's voice sounded incredible, there's still one thing that was remarkably off - it's when he had an episode of temporary memory loss and started singing the wrong lyrics. And though the performance was just an added bonus for Grande's Miami audience, TMZ shared Bieber profusely apologized.

"So I'm feeling a little bad. I forgot the words, Ariana," Bieber said, as E! News quoted. "I've been trying to memorize them backstage for like an hour, I feel so bad I'm so sorry. Do you guys forgive me for forgetting the words? I feel terrible. "

Since Justin Bieber forgot the lyrics for "Love Me Harder," a song originally performed by The Weeknd, did Ariana Grande feel upset? Well, no. In fact, the 21-year-old "Problem" songstress even picked up on his mistake and jumped in to help him out.

According to People, the young singers continued to perform two songs including Bieber's hit "All That Matters" and "As Long As You Love Me" with Grande taking over the rap verse originally performed by her boyfriend Big Sean.

Later Saturday night, Justin Bieber posted an Instagram of his duet with Ariana Grande, comically citing his mistake.

"Had fun with u Ariana, even tho I forgot all the words haha," he wrote. While Grande took to Twitter and thank Bieber writing, "Thank u Miami babes and thank u @justinbieber!!!!!!"

Meanwhile, Justin Bieber is reportedly sued by a Toronto SUV limousine driver for an alleged assault nearly two years ago. As per another People report, the Canadian pop star purportedly punched him in the head repeatedly in December 2013.

Abdul Mohar, the driver, is asking $850,000 for damages, a separate TMZ report revealed. CTV News also added the alleged victim is also seeking a court order preventing Justin Bieber from coming within 100 meters from him. In his Toronto Star statement, Mohar claimed Bieber punched him "very hard" after climbing into the front seats and turning the stereo's music to full volume.

Even though Justin Bieber appears to have change his offensive antics as of late, his previous misdemeanors continue to catch up with him.

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