Nicole Scherzinger singing phantom of the opera
Perez Hilton posted the video if you haven't seen it, and I'm very impressed. Her voice was a bit timid in the beginning, especially in comparison to the phantoms. Her vibrato also seemed a bit shaky.
But she did a very solid job. What was truly amazing to me, was her ability to sing the high notes at the end.
Very few pop singers would have that kind of vocal range. Very few pop singers would be able to sing in an opera format at all. My view of her singing ability has increased immensely.