JUSTIN Bieber in a desperate bid to win back Selena Gomez?

JUSTIN Bieber is in a desperate bid to win back girlfriend Selena Gomez.

The singer partied at the Whisky River club in Charlotte, North Carolina following his concert on Tuesday night but was on his best behavior and friends believe he is trying to prove to Selena, 20, that he has grown up.

"Justin wasn't drinking," a source said.

"He was very polite, he was just chilling with his people. He arrived at 1.30am and the club closed at 2am so he wasn't here for long. He was on really good behavior; he was just relaxing and listening to music. He was having fun. A few fans asked for photos, and he was friendly with them. He wasn't flirty at all."

However, Selena has reportedly moved on after telling friends that Justin, 18, was too needy for her.

"Justin is super needy and can be a big baby around Selena. It's hard for him to make real friends because he likes the temporary attention of strangers, but didn't see how it hurt Selena," a source said.

"Selena didn't feel Justin was respectful of their relationship. She was constantly catching him in positions with other girls that would make her uncomfortable. She would get super jealous."