PAUL AT ROGERS ARENA - SECOND SHOW IN VANCOUVER

Fans turning up to watch Paul’s second sold out Vancouver show were treated to something extra special on Wednesday night, and we’re not just talking about the sensational performance from the man himself.

Instead it was a special guest who stole the social media limelight as The Tonight Show host Jimmy Fallon took to the stage to join the legendary Beatles singer.

“If you didn’t have enough surprises, we’ve got another one for you,” said Paul ...

“We’ve got a young man here who’s a friend of mine,” Paul told the audience. “I think you just might know him. He’s off The Tonight Show. Jimmy Fallon!”

The Tonight Show host showed off his dance moves while singing 'I Saw Her Standing There'

Tonight Show host Jimmy Fallon surprised audiences at Rogers Arena when he joined Paul on stage.

Fans at last night's sold-out Paul concert at  Vancouver's Rogers Arena were treated to an array of surprises, including an unexpected performance by Jimmy Fallon.

The Tonight Show host joined Sir Paul on stage during the encore to sing and rock out to I Saw Her Standing There.

But not before taking off his Canucks hat and wishing people happy 4/20.

"When you were playing yesterday, the guy in front of me legalized it for at least three minutes, so I want to say congratulations to that guy," said Fallon. 

Fallon rocked out hard and even broke out his best human worm dance moves, prompting McCartney to joke about his 'low energy' after the song.

Jimmy Fallon even did the worm on stage during his surprise performance.

Fallon was not the only special guest at Paul's One on One tour concert — the Delta Police Pipe Band also took to the stage. Chck out the video below:

Pre show with DJ