Jonas Bros.

You'd expect all eyes to be on Nick Jonas while he's performing for a bunch of 13-year-olds -- yet an adorable preteen fan stole his thunder during a Bat Mitzvah.

Nick made $100,000 to be the surprise singer at Jillian Gaslow's Paris-themed event in NYC last weekend. If you're wondering who coughed up the dough ... Jillian's pop is a furniture industry big wig.

The JoBro was hired to belt out 3 tunes, including "Jealous," during a 30 minute performance -- and while the crowd LOVED him ... Jillian seemed a little nervous and starstruck onstage.

Best part of the vid ... the little girl who stormed the stage and shocked Nick with a bear hug. #SpotlightStolen.

Mazel Tov!

Don't worry Tom Coughlin, the Jonas Brothers got your back.

With Tiki Barber calling for Coughlin's job, Nick Jonas -- a huge NY Giants fan -- is still supporting his favorite head coach, telling TMZ Sports he loves the guy ... despite the team's 3-7 record.

Terrell Owens is taking on Kevin Jonas and Gilbert Gottfried in a battle for Donald Trump's approval -- because they're all on the next cast of "Celebrity Apprentice."

TMZ Sports broke the story back in March that T.O. would be joining the cast ... and now NBC has finally revealed the full list of stars competing on the show.

The rest of the cast ...

NY Giants superstar Victor Cruz can rest a little easier ... 'cause one of the Jonas Brothers has his back ... when it comes to prayer.

Kevin Jonas was out in NYC with his wife Danielle -- when we talked about Kev's favorite NFL team ... the Giants ... who lost their big WR to a nasty knee injury on Sunday night.

"I feel bad for Victor Cruz," Kev told us ... "But he's definitely in our prayers."

As for the G-Men, Kevin says he still has hope ... though after that 27-0 loss to the Eagles, he might wanna pray extra hard this week.

Nick Jonas is promoting his new album by appearing shirtless in Flaunt magazine's new spread ... wearing only underwear ... and grabbing his crotch. Makes total sense, right?

This JoBro has a good grip on his career.

Nick Jonas learned, when in Rome ... because he joined the crowd at a gay bar with some half naked men and became somewhat naked himself.

Nick teased the crowd at BPM's Gay College Tuesday's in NYC ... coyly leading the excited crowd into believing A LOT was about to come off. He stopped short of the full monty, but still did not disappoint.

He was there to promote his new single but had the urge to jump on stage with a bunch of shirtless dudes.

Joe Jonas had a nice relaxing birthday in Las Vegas … if your idea of relaxing is getting dragged up on stage and having two little people strippers grind on your crotch.

Happy 25th, pal!

Joe Jonas had a small celebration for his 25th birthday in Las Vegas ... with two tiny strippers and David Copperfield. We'll explain ...

Joe hit up a Copperfield show at the MGM Grand where he got pulled up on stage and David asked him when he last got laid. Joe said it's been about a month ... the crowd loved it.

The main event went down Saturday at Beacher's Madhouse ... where Joe was once again called up on stage. But instead of a magician, he was entertained by two little people strippers ... a mini Miley Cyrus and a girl who holds the distinction of being one of the smallest strippers in the world.

We're told the Beau Joie Champagne was flowing ... along with several bottles of Casamigos Tequila sent over by George Clooney.

Joe Jonas made a spontaneous endorsement for a fan’s high school presidential campaign ... which put her over the top on election day!

Now, the hot topic is whether JJ's endorsement constitutes tampering.

Bonus question: High school kids still know who Joe Jonas is?

Joe Jonas wields great political power ... among high schoolers at least ... after his campaign endorsement helped a girl win her student council's presidency.

Here's how it went down ... the JoBro was at Monday night's Los Angeles Kings game when he was approached by a fan for a photo. She then took it a step further ... and asked him to film a short video telling the students of Culver City High School to vote for her for student council president.

He did and Mia posted the vid to her Instagram page that night ... and won the election Wednesday morning. Mia (middle) tells TMZ she doesn't think she won the election JUST because of the video, but she did have a few people in the halls at school tell her they voted for her because of it.

Joe tells TMZ, "Really excited the ad worked! I've actually launched a political ad firm - but only for high school and college campaigns, and only while I'm at sporting events. We're open for business!"

Kevin Jonas -- in an effort to find new ways to make a buck -- has a baronial way of making a quick killing ... renting out his sprawling New Jersey manor and throwing in Super Bowl tickets.

Kevin's crib is 36 minutes from the stadium so ... for the convenience and the amenities he wants $20K a night. He's throwing in 4 tickets to the big game.

Of course ... WHERE you sit in MetLife Stadium is critical. Kevin says the seats are good ... but he's not specific.

Jonas won't be spending the weekend at a shelter. He and his wife have a new house close by.

Joe Jonas has found a new gig after the dismantling of his band ... he drives a fancy cab.

Joe has been officially certified by Uber to drive drunk and sober people alike through the streets of L.A.

The middle Jonas took random passengers to Pinkberry this week. The question is ... why?

We're told he's working with a mystery company -- not Uber -- to film a spot they hope will go viral. We're getting conflicting info on the company ... some people are saying MINI Cooper, but we're not sure.

Well the Jonas Brothers finally explained absolutely ... NOTHING about why the band is dunzo during a bizarre GMA interview this morning.

Nick Jonas came closest to breaking down their issues when he acknowledged, "We've had some complications in the group for a long time, without addressing them."

Nick seemed to be talking about disagreements over music -- but it's hard to say for sure since he was so damn evasive!

As we've told you ... Joe Jonas was spotted around Hollywood with a well-known addiction specialist days after the guys pulled the plug on their concert tour. Joe and his bros never addressed that -- though to be fair ... GMA never asked.

Watch the clip Jonas fans ... maybe you can figure out what the hell really happened.

Kevin Jonas and his wife Danielle are calling it quits ... on their giant New Jersey home -- listing the property for $2.2 million -- and sources tell TMZ, it's all because they want more privacy.

KJ and Dani purchased the home in 2011 for $1.19 million -- so if they get anywhere near their asking price (with the help of Terrie O’Connor Realtors Amy Werner and Celia Riggio) they'll have earned a nice little profit. Not bad for just two years.

We're told the couple plans to start showing the home to potential buyers next week at a private event -- and they've already purchased property nearby to start building an entirely new place to live.

According to sources, it's not about the size of the property -- the couple just feels their current home is too exposed ... it's already famous from their show "Married to Jonas," it's visible from the street ... and they're not comfortable with that. Especially because Danielle is pregnant now.

Maybe Kevin and Dani should start a band ... at least they can stay together.

Another strong sign of the apocalypse ... if you're a Jonas Brothers fan -- the band has deleted its Twitter page right on the heels of pulling the plug on their tour.

Fans who went to @JonasBrothers this morning got a "Sorry, that page doesn't exist" message -- and even though they haven't officially announced they're done for good ... this is pretty strong evidence.

As we reported ... Kevin, Joe, and Nick canceled their tour last week ... just days before it was supposed to begin. Reps say they were having a disagreement over music.

Since then we've spotted Joe Jonas twice around town with renowned addiction specialist Mike Bayer -- fueling concerns Joe has a substance abuse problem.

Jonas Brothers reps remain silent on the issue -- but we saw Joe yesterday in Hollywood (sans Bayer) ... and asked him about the band's future. Sorry fans, but it ain't looking good.