Beyonce a triple threat at the Oscars

Beyonce Knowles will have her work cut out at the 77th Academy Awards on February 27 - she's singing three of the five nominated songs.

The Destiny's Child star had already signed up to duet with Josh Groban on The Polar Express theme Believe and now she has agreed to sing the Original Song nominees from Phantom of the Opera and Les Choristes (The Choir).

Phantom star Minnie Driver was considered the obvious choice to sing Andrew Lloyd Webber's Learn To Be Lonely at the Oscars as she sang the tune on the film soundtrack, but Knowles has stepped in to perform.

She'll also sing Look To Your Path from Les Choristes.

Meanwhile, rockers Counting Crows will perform their Shrek 2 Best Song nomination, Accidentally In Love, while there's no confirmation as to who will sing the fifth nominated song, The Motorcycle Diaries' Al Otro Lado Del Rey at the awards show.