R&B singer Beyonce Knowles is to perform a selection of Oscar-nominated songs at the Academy Awards ceremony, organisers have announced.
Beyonce will perform three songs at the Academy Awards ceremony
The chart-topping star will sing Learn To Be Lonely from the film version of The Phantom Of The Opera and Look To Your Path from France's Les Choristes.
Knowles will also duet with Josh Groban for Believe from The Polar Express.
The Counting Crows will sing their own Oscar-nominated song Accidentally In Love in Los Angeles on 27 February.
A performance of the remaining contender - Al Otro Lado Del Rio from Che Guevara biopic The Motorcycle Diaries - has yet to be announced.
The winner of last year's Academy Award for best song was Into The West, which was performed by Annie Lennox at the ceremony.
The song prize, which was first awarded in 1934, has been won by Eminem, Elton John and Bruce Springsteen in recent years.
Meanwhile, the ABC television network, which is screening the awards ceremony, has imposed a time delay on the broadcast so that any bad language or other controversial incidents can be edited out.
A spokesman for the Academy said that ABC had taken the decision.
"There is no requirement that they do it, and we don't want them to do it. But they are the ones that have the control," he said.