Justin Bieber Emotionally Apologizes to Fans, Says He's Done Pretending

Justin Bieber has made a emotionally video after appearing on Ellen. 

Bieber seemed to be pouring his heart out in the video he posted late Wednesday evening. He copped to covering up his true feelings for the past year and a half ... and promised he was trying to change.

The video mea culpa came hours after Justin taped an episode of "Ellen." Sources at the taping tell us Justin kinda bombed the appearance -- giving Ellen DeGeneres one word answers ... and seeming extremely nervous.

In his confession, Justin says "I was afraid of what people are thinking about me right now."

TMZ