Hi Grace, I don't know what the problem would be. Are you having problems with all the links?
I know the next three won't be favoured by most posters but hopefully a few, like me,may enjoy them.
Montserrat Caballé: http://www.youtube.com/watch?v=FIQQv39dcNE&feature=related
Marianne Anderson Brahms Alto Rhapsody (her octave range is amazing to me)
Part 1: http://www.youtube.com/watch?v=2w35B8hK5Y4
Part 2: http://www.youtube.com/watch?v=lAvX_UwmQzQ&feature=related