Demi Lovato, perhaps the most notable guest so far, was greeted by ear-shattering shrieks from millennial fans when she ...

In 2010, Natalie Portman and Mila Kunis rocked the movie theaters with their psychological ballet thriller, Black Swan. The ...

From Jesse McCartney to Demi Lovato, here's who the Jonas Brothers have surprised fans with on their Jonas20 Tour, so far.

Not only did Isaac, Taylor and Zac Hanson perform their mega-hit "MMMBop" alongside their fellow band of brothers, but they ...

The Jonas Brothers welcomed Demi Lovato, Switchfoot and more surprise guests during their Jonas20 Tour performances in 2025 ...

Singer turned talk-show host Kelly Clarkson sings a rendition of the 2006 hit with the band during an appearance on 'Songs & ...