Rihanna rocks out with Bon Jovi

After meeting on The X Factor last week, Rihanna joined Bon Jovi on stage in Madrid to sing the band's classic hit Livin' On A Prayer.

Both artists were in the city ahead of the MTV Europe Music Awards.

Bon Jovi fans were shocked when lead singer Jon called the Umbrella singer onto the stage at the Teatro Circo Price venue on Saturday night.

22-year-old redhead Rihanna was clearly delighted to have dueted with the rockstar, writing on her Twitter page:

"Wait!... did I just rock out with Bon Jovi tonight??? WTFFFF! (What the f**k) (sic)."