'Glitter' provides the musical backdrop for the warbler's forthcoming film 'All That Glitters'...
The diva will play a waitress -presumably in an establishment without stairs. Mariah doesn't 'do' stairs...
The 31-year-old singer says "Hallelujah" without warbling once...
The star's reported offer from Virgin could earn her up to £60 million...
The star is said to be looking for a new #20 million deal...