Singer Justin Bieber, who was in tears in an emotional outburst on stage, shared that he had lost his "purpose", but he's now "happy". He is convinced that there's "light at the end of the tunnel".

During a performance last week, the "Baby" star wept onstage while hosting a fan live question and answer session, reports dailymail.co.uk.

The 21-year-old star appeared to find the candid experience and the support from his fans slightly overwhelming during the evening, which also saw him perform tracks from his latest album `Purpose`.

Addressing his tears on Twitter following the gig, the Sorry hit maker gushed: "You guys just got me crying. Damn. I missed this and u. Thank u so much. Thank you. #Purpose."

Bieber, who vowed to combat his public temper tantrums, discussed his vandalism case as well as dealing with some attendees throwing objects including a smartphone onto the stage.

One excited fan told the baseball hat wearing star that she skipped school to attend the event and asked him for a photo.

He said: `I would say school is important, but this is probably a little more important," joked the Sorry singer, and said: "Stay in school, kids".

Bieber, who briefly removed his hat to reveal his peroxided hair, answered affirmatively to both questions, telling the audience: "I'm happy overall, I'm a little stressed out, but I'm happy. I'm just being honest."

He also explained his state of mind after he damaged a neighbour's house with eggs and was sentenced to community service.

`I just felt like I lost my place for a while. I lost my purpose, and I wanted to just be light and let people know that whether you don't feel like you have a purpose, whether you're just trying to figure it out, there's a light at the end of the tunnel,` he said.

Bieber was later joined by an acoustic guitarist and they performed five songs together, including new tunes `Sorry` and `What Do You Mean?`.