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(WENN) - Justin Bieber's concert at New York's Apollo was so electrifying, the venue lost power - leaving the pop star to orchestrate a mass singalong with the audience.

PHOTOS: Men We Heart - Justin Bieber

The Biebs was in the middle of performing with special guest Ludacris Monday night when a transformer blew, prompting fans to fear the gig would be cut short due to the technical glitch.

However, Bieber remained unruffled and urged the crowd to sing his hit "Boyfriend" a capella for an epic finale - and the results so impressed the singer, he later took to his Twitter page to thank his audience.

He wrote: "Me and  blew up the power at the . Haha. Epic. "

"A night none of us will ever forget!! That is how u end an run!!! With no power for the last song...my fans sang it 4 me!"

"What I saw tonight! My fans! My Beliebers! They stepped up for me! I love u! I will never forget 2nite! That was the way a show should end.."

"...our songs...our voices...OUR ALBUM!!! "

The gig was his final stop on a mini world tour, during which the teen sensation gave free shows around the globe for a forthcoming U.S. TV special.

Justin's new album, Believe, is available now.

Check out video from the show:

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