The Jonas Brothers kicked off their world tour on Saturday in Dallas at the Cowboys Stadium, and it seems like the guys pulled out all the stops to keep the crowd of nearly 50,000 entertained.

According to reports, the JoBros played songs both old and new, including cuts from their new album, Lines, Vines and Trying Times, which was just released last week. But the performance of one new song in particular really drove the crowd wild.

For "Before the Storm," a duet between Nick Jonas and Miley Cyrus from Lines ..., Nick was joined onstage sa pamamagitan ng none other than Cyrus. The performance comes amid...