The Jonas Brothers surprise Alessandra and Kim onstage.

4 of 7
After Kevin, Nick and Joe found out Kim and Alessandra had tickets to one of their concerts, they decide that's where the surprise should go down.

In front of thousands of screaming concertgoers, the brothers stop the music and call their two biggest fans onstage. "You two wonderful ladies have been calling and writing Oprah for us to get onto the show," Joe says. "Well, we are going to be on Oprah, but there's one more guys are coming too!"

Watch Watch the Jonas Brothers surprise Kim and Alessandra.

After a lot of screaming, crying and jumping up and down, Kim calms down enough to call her mother and share the good news.