The singer was nearing the end of a private show in front of a packed house when the power for most of the stage instruments suddenly went out, said his manager, Scooter Braun.
"Then we hear the fire alarm," Braun said by phone Monday evening. "Literally, the boy blew up the Apollo -- he heated up the Apollo."
But Bieber still managed to finish his show, with the help of fans singing along with him.
"What it turned into was an Apollo moment, like one of those impromptu things," said Nina Flowers, the Apollo's rep.
"It was one of the most special nights I have ever been a part of," said Braun.
The power outage, which only affected the stage instruments and some lighting, occurred toward the end of the show. Braun said they were told the problem was supposed to be only a few minutes, but it stretched to more than 40 minutes.
At first, Bieber took the outage in stride.
"He was joking, he said it was all the hot girls in here," Flowers said.
He then got on the drums, which were working, for a solo, and had the crowd serenade Braun for his birthday.
Then Bieber put his energy into performing for his fans, who stayed in the audience during the delay.
"He walks out, he literally quiets the crowd, and he says, 'I'm sorry the power is out. [But] you guys have always had my back. I'm going to sing 'Boyfriend' and you're going to sing it back to me.' "
-- ASSOCIATED PRESS
Singer Bobby Brown remarries in Hawaii
Singer Bobby Brown has remarried in Hawaii, four months after the drowning death of his ex-wife Whitney Houston, People magazine reported on Tuesday.
Photos of Brown, 43, a member of the New Edition band, his new wife and manager, Alicia Etheridge, and their wedding party were posted on Instagram by the singer's teenage son, Bobby, Jr.
People magazine said the couple tied the knot on Monday, a day after Brown performed a New Edition concert in Honolulu.
Brown and Etheridge have a young son together and became engaged on stage in 2010 -- three years after Brown's acrimonious divorce from Houston.
Brown has five children, one with Houston, three from previous relationships, and one with Etheridge.
Max Page, mini-Vader, released from hospital
LOS ANGELES -- The 7-year-old actor who plays a pint-sized Darth Vader in a popular car commercial is out of the hospital after open-heart surgery.
A spokesman for Children's Hospital Los Angeles said Max Page was released Monday, four days after his pulmonary valve was replaced in a two-hour operation. Max headed home with his parents and younger brother.
Max, who plays Reed on the CBS soap opera The Young and the Restless, was born with a congenital heart defect and has undergone multiple surgeries.
Photographer says Alec Baldwin hit him
NEW YORK -- A New York City newspaper photographer says Alec Baldwin punched him outside a marriage license bureau.
The Daily News reports that Marcus Santos was snapping images of the 30 Rock star and his fiancee, Hilaria Thomas, on Tuesday morning in Manhattan.
Santos tells the newspaper that Baldwin grabbed a second news photographer, then started shoving Santos and hit him in the chin. He then walked away.
Photos on the newspaper's website appear to show Baldwin shoving the photographer.
No police report has been filed. A call to the newspaper's public relations office wasn't returned.