Music
Rex Features
The singer, who has been confirmed to perform at the 'Help For Haiti Now' telethon, has allegedly been rehearsing a new track from the LP for the event.
"Watching a rehearsal of a song from christinas new album that shes perfrming live for haiti on clooneys benefit tomw nite. Someone pinch me, (sic)" an onlooker wrote on Twitter.
Aguilera is scheduled to release Bionic in March and confirmed song titles include 'Glam', 'Bionic' and ballad 'Lullaby'.
The 29-year-old worked on the new album with collaborators including Goldfrapp, Ladytron and M.I.A, as well as producers Linda Perry, Tricky Stewart and The Neptunes.
Aguilera released her greatest hits collection Keeps Gettin' Better - A Decade of Hits in November 2008.
More: Christina Aguilera, Music
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