Now getting the words wrong in a song isn't always the worst thing but when you obviously forget them and replace with 'blah, blah, blah' you have a problem.
On Tuesday night Justin Bieber made the crowd go wild as he hit the stage at 1 OAK in New York to sing the Spanish hit Despacito, which he is featured in.
Unfortunately for Justin he doesn't know of forgot the words as he began singing ''blah, blah, blah''.
Probably not the best way to cover up forgetting words Justin.
Check it out!
