New York: Singer Rihanna became a surprise addition to Bon Jovi`s Madrid show as she joined the veteran rocker for a rendition of their hit song, `Living on a Prayer`.
"It was so beautiful, she sang great, she`s a sweetheart of a girl, she`s a big fan too. It was great," people.com quoted Jon Bon Jovi as saying.
Performers slated for the show included singers like Katy Perry, Kings of Leon, Kesha, Kid Rock and Linkin Park.
Bon Jovi also spoke about controversial singer Lady Gaga.
"If Elton John and Madonna had a baby, it would be Lady Gaga. I`ve seen her perform at a number of events. She`s a college-trained musician, a student and a fantastic performer," he said.
"She gives it all that she`s got. When she develops with time and continues to work on her sound, she is going to have a really bright future," he said.