Justin Bieber admits he has been ''arrogant and conceited''.

The 'Boyfriend' singer has made an apology video to fans in which he admitted he has been ''pretending'' to be someone else and is struggling with ''growing up in this business'' following a ''nervous'' taping of 'The Ellen DeGeneres Show'.

In the clip, posted on Facebook, the softly-spoken star said: ''I was really nervous, and I think I was nervous because I was afraid of what people are thinking about me right now.

''It's been a minute since I've been in a public appearance and I didn't want to come off arrogant or conceited - or basically how I've been acting the past year or a year and a half. I'm not who I was pretending to be. And where I say pretending - often we pretend to be something we're not as a cover-up of what we're truly feeling inside.''

''Just being young and growing up in this business is hard.Growing up in general is hard.''

As well as feeling remorseful for his past conduct - which has included wild parties, egging of a neighbour's house and arrests for driving offenses - Justin, 20, wants people to know how much he ''genuinely cares'' and wants to be a good person.

He added: ''I really wanted people to know how much I care. How much I care about people. And how I'm not that person to say that 'I don't give a f**k.

''I'm a person that genuinely cares. And although what's happened in the past has happened, I just want to make the best impression on people and be kind and loving and gentle and soft.''

His appearance on 'The Ellen DeGeneres Show' will air today (29.01.15).