OTTAWA - The Jonas Brothers will have to be declared a threat to healthy hearing if this fan screaming thing keeps up.

More than 17,000 fans, mostly female teens and their mothers and BFFs, were at their decibel-breaking peak last night as the Jonas Brothers put on one of the most theatrical concerts to ever hit Scotiabank Place.

It was a good thing that 21-year-old Kevin, 20-year-old Joe and 16-year-old Nick came with plenty of amplification (and a 10-piece band) because they needed every watt just to be heard over the incredibly loud cheers of fans.

Note to self, bring earplugs and Aspirin next time teen idols come to town.

In case you haven't heard about these young phenoms, the Jonases are more than fresh-faced popstars who starred in the movie Camp Rock and a 3-D concert film as well as their own television series for Disney called JONAS.

UNRELENTING SHOWMEN

They are an entertainment machine. From the opening chords of Queen's We Will Rock You that opened their show, the three brothers proved to be unrelenting showmen.

Perched on a revolving turntable at centre ice with two smaller stages at either end, they opened with Paranoid off their new album Line, Vines and Trying Times with Nick and Kevin playing guitars while Joe rallied the crowd to cheer. Nick also sang That's Just the Way We Roll and Poison Ivy before giving the mic to Joe for Hold On and Play My Music.

"This is our last stop on the tour," Kevin explained while Nick disappeared, only to re-emerge at centre stage at a white grand piano playing their romantic Fly With Me accompanied by two violinists, and Little Bit Longer all by himself, before telling the touching story of how he discovered he had diabetes four years ago with almost tragic sincerity.

Joe lightened the mood singing Much Better and Year 3000 and Tonight while Kevin rocked his guitar like Peter Townshend and their 10-piece band took turns jumping on a trampoline where the piano used to be.

That constantly revolving stage was a thing of beauty, giving the band and concert a sense of energy, especially when lit.

And even though Nick seemed to be the shyest of the three, he was by far the strongest and most natural musician, even playing the drums during Live To Party.

Joe was the most colourful, playing the host, complimenting the girls on their signs and running back and forth across the constantly revolving stage.

"I feel like going real crazy tonight," Joe added.

Of course, going crazy meant singing another song -- in this case, Gotta Find You featuring violins while their hydraulic stage rose high into the air.

Those boys don't miss a trick. They included a tune for the parents, with Joe singing a cover of Neil Diamond's Sweet Caroline and later, thanked their father for being such a good role model.

That must have sounded sweet to all the parents in the crowd.

Jordin Sparks joined them to sing Battlefield after which Kevin performed his own version of singing in the rain to virtual showers on Lovebug.

Occasionally, they tried to make the show look more spontaneous, but in reality, it was a tightly choreographed concert with no element left to chance. I haven't seen this much theatrical technology since Pink Floyd. But don't forget, they've got the Disney corporation behind them, and with that kind of showbusiness firepower behind them, how can The Jonas Brothers lose?

Earlier last night, Sparks heated things up for the Jonas siblings.

The sixth season American Idol winner got glowsticks waving with her single SOS and her Grammy-nominated hit No Air.