'Babe, I'm working here!' Justin Bieber can't keep his hands off Selena Gomez as she presents at the MTV VMAs

Justin Bieber and Selena Gomez are clearly done with the cloak and dagger antics from the start of their relationship.

The cute couple are out and proud - maybe a little too much, judging by Bieber's PDA performance while his girlfriend was attempting to co-host a pre-show at the MTV Video Music Awards tonight.

Disney princess Gomez interviewed her boyfriend in the arrivals hall at the awards ceremony.

Cute couple: Justin Bieber and Selena Gomez appeared together at the MTV VMAs

And while Selena, 19, tried to act professional, Justin found it hard to keep a straight face - or his hands off his girlfriend.

The U Smile singer planted an unexpected kiss on Selena as she signed off from their interview.

A giggling Miss Gomez was a little taken aback as her 17-year-old beau continued to kiss her and nuzzle her neck in front of the live cameras and had to forcefully remove herself from his clutches.

Professional: Selena interviewed her boyfriend as part of her co-hosting gig for the VMA pre-show for MTV

Excuse me! As Selena signed off, Justin leaned in unexpectedly and planted a kiss on her

Before the surprise PDA, Selena was the picture of professionalism as an amused Justin answered her questions.

She grilled him on his outfit of red trousers, animal-print trainers and his accessory - a pet snake named Johnson.

'You're up for Best Male Video,' Gomez asked her popstar boyfriend. 'I wan to know -  you're up against Eminem and Bruno Mars, do you feel a little nervous at all?'

Stop! Selena dissolved into giggles as the singer refused to stop nuzzling her neck

That's enough: The Disney princess has to forcefully remove herself from her boyfriend's clutches on camera

'You know, I'm just excited to be in the category with such amazing people,' Bieber answered. 'I'm just happy to be here.'

Selena continued: 'Rumoured to be performing is Jay-Z and Kanye [West], and I know you like them both. Are you excited to see them perform?'

'Very excited,' Bieber replied. 'I heard that it was kind of a last minute thing, but I'm really excited.' 

Hands on: Bieber also hugged Selena onstage as he accepted the award for Best Male Video

Bieber also admitted he was looking forward to Beyonce's performance just as much.

Selena let down her guard a little as she prepared to cross back to her co-host Sway, telling Justin: 'Thank you so much. Thank you for hanging out, babe.'

The overly affectionate display didn't appear to annoy Selena too much, as the pair enjoyed another cuddle onstage during the ceremony as Bieber accepted the award for Best Male video.

Star: Gomez arrived early to begin co-hosting duties for the VMA pre-show

Say hello to my little friend: Bieber brought along a pet snake named Johnson

Source: MTV