You probably don't remember the Jonas Brothers in "Night at the Museum: Battle of the Smithsonian." They provided the voices of three singing cherub statues come to life. On the DVD, however, they get their own bonus feature, which is sure to be the highlight for kids.

"Rather than do a written press release regarding the casting of the Jonas Brothers as the voice of the cherubs, I had this idea of what if we did a fake behind-the-scenes documentary about the grueling training that I put the Jonas Brothers through to do the voices of marble naked babies," said director Shawn Levy. "I started working on this thing and I wrote a bit of it and Ben Stiller wrote a bit of it so we decided to make this three minute documentary called 'Cherub Boot Camp.'"

Internet viewers may have seen the spot already before the film's release. Levy forces the Disney pop stars to prance and fly, and punishes them for not getting cherubs right. Internet comments made their way back to Levy. "The one that really upset my daughters was, 'Why is that old guy being so mean to the Jonas Brothers. I guess that makes me the old guy, which is depressing to most of us."

The original idea was to make the Jonas Brothers a surprise cameo, but it was their idea to come forward. "As I was finishing up the movie, I brought the Brothers into this theater and say, 'You guys should see the movie so you see what you're in.' I screened the movie for the boys and they promptly said, 'Okay, that stuff about wanting to keep it a secret, we don't want it to be a secret. We want actually to very much be a part of this movie. No reason to not be public about it.'"

"Night at the Museum: Battle of the Smithsonian" is out December 1.

See more photos of Night at the Museum: Battle of the Smithsonian here!

Image © PR Photos

Story/Interview by Fred Topel

Starpulse contributing writer

(Starpulse in Hollywood): Every week, Hollywood's biggest stars are meeting in the hot spots and Starpulse is there.