John Norum joined Deep Purple on stage in Ystad for a performance of "Smoke on the Water".

After the intermission, he joined the first violins for a performance of Beethoven's Ninth Symphony.

White brings in an experienced studio bassist to join The Wonders for a live performance on a prestigious national television variety show.

They were even joined by Coleman for a performance of the song at a show in New Zealand in 2003.

At the 1991 Reading Festival, Kelly joined Nirvana on stage for a performance of "Molly's Lips."

Former members Lord Sabathan and Nguaroth joined the band for a one-off live performance in 2010 as an act of reconciliation.

Two of the most famous Finnish hip hop stars join together for an exclusive performance in the Station T studi...

Lauper joined them on stage for a one-time performance at New York's Lone Star Cafe.

He also had a guest appearance in the popular kids' show "The Naked Brothers Band", in which he joined the band for a performance.

Ric Hordinski, formerly of Over the Rhine, joined the festival for a rare public performance with his band Monk.