The episode, entitled 'Brittany', is dedicated to Spears and will feature a cameo appearance from the singer.

The ficitional glee club will perform Spears' hits 'I'm A Slave 4 U', 'Baby One More Time' and 'Toxic' during the episode.

Paramore's 'The Only Exception' will be the only non-Spears song.

Spears is the latest artist to be recognised by the show. Other episodes have featured the music of Lady Gaga and Madonna.

Sir Paul McCartney, George Michael and Coldplay are all understood to have agreed to take part in the second series.

(by Jason Gregory)