Rihanna Debuts New Song at Jay-Z Concert

Rihanna gave fans at Jay-Z's Los Angeles concert a special treat on Sunday when she took to the stage to debut her new song Hard.

The Bajan beauty joined her mentor during his show at the University of California, Los Angeles, where they performed their hit single Run This Town.

Rihanna's surprise appearance was warmly received by the crowd, and she showed her appreciation by premiering her brand new track for the L.A. audience.

It was Rihanna's first live appearance since her explosive TV interview with newswoman Diane Sawyer aired in the U.S. on Friday night, in which she opened up for the first time about her brutal beating by ex-boyfriend Chris Brown.

The Umbrella hitmaker will debut more new material from her fourth studio album, Rated R, at a secret concert in London next Monday.

The gig, at an undisclosed location, will be broadcast live online ahead of the disc's release on 23 November, reports MTV.com.