AceShowbiz -

Whoops! Justin Bieber didn't do very well performing a smash hit song he's featured in, "Despacito". During his performance at New York City nightclub 1 Oak on Tuesday night, May 23, the Canadian singer basically forgot every Spanish lyrics on the track and changed some lines with "blah, blah, blah" instead.

In the footage obtained by TMZ, Bieber seemed to have a blast while singing the Luis Fonsi and Daddy Yankee's hit record. As a matter of fact, he didn't look so guilty for forgetting the lyrics. He even changed some of the lyrics with random Spanish words. "I don't know the words so I say paquito/ I don't know the words so I say dorito," he sang.

During the surprise performance, Bieber also channeled his inner hip-hop star as he sang a rendition of Kendrick Lamar's chart-topping single "Humble". In a snippet shared by a fan, the pop star could be heard rapping lines like, "I'm that new Jason Bourne, reborn, a revolution."

Bieber is no stranger to hip-hop. After collaborating with Ludacris on 2010's "Baby", he has teamed up with many rappers, including Kanye West, Busta Rhymes, Travis Scott (II), Chance the Rapper and Young Thug.