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"The first time you see the audience, it's the best thing ever," says Kevin (rocking with Nick and Joe in Boston).

"Before a show we have a 40-minute lockdown where we get dressed, hang out and do warm-up vocals," says Kevin.

"I love seeing fans' reaction to our music," says Kevin.

Nick gets a touch-up before heading back onstage during the Best of Both Worlds Tour with Miley Cyrus.

"I wear football pads so I don't get hurt when I slide onstage," says Nick.

JOE VS. MILEY
During the Best of Both Worlds Tour, "Joe would battle Miley onstage," says Kevin. "They'd do mic tricks to see who was best in front of everyone. One time they were doing it, and all of a sudden Joe went down into a full split and came back up with his mic stand. Miley's mouth dropped like, 'I hate you.' It was hilarious."

Joe takes a photo with his mom during a chopper ride from N.Y.C. to Atlantic City.

A STILL SLEEPY KEVIN AT AN EARLY-MORNING RADIO SHOW IN N.Y.C.

FRANKIE HANGING OUT WITH THE CAT IN THE HAT ON HIS TOUR BUS BUNK.

"There are times when we just can't believe everything that is happening," says Nick. "I think, 'Wow, we're so blessed.'"

JOE'S backstage workout

"It builds confidence." says Joe of working out.

"It's cool when someone says something like, 'Your triceps look huge!'" says Joe, in mid-biceps curl.

"I work out every single day," says Joe, who's worked up to bench-pressing 165 lbs.

"All my shirts are getting tighter!" he says of his increased muscle mass. Here he uses brother Frankie as a free weight.

"My parents and my brothers keep me grounded," says Joe (having lunch with his bros in Atlantic City). Adds Nick: "We have a good time wherever we are."

Before every show the boys sign autographs.

"Joe and I share a room when we're on tour," says Nick. "And we pack our own bags."

"Most of the time we roll right after the concert," says Joe (here on the tour bus). "And then we get food."

Fan-tastic! THE BUS

Jonas Brothers fans started a tradition of declaring their devotion with spray paint and pens, using one of the band's buses during their Look Me in the Eyes Tour as their canvas. "It was like a scrapbook for our tour," says Kevin.

"Call me," wrote some fans. "They were so creative in trying to get our attention," says Nick.

"Makes you wish you could keep the bus," says Joe of all the notes.