Aria "Ombra mai fu" from the opera Serse (Xerxes) by George Frideric Handel sung by countertenor, tenor, mezzo-soprano and baritone. Thanks those Youtube users posting them so I know Yoshukasu Mera from there.
1. Placido Domingo - Ombra mai fu (Händel) with scores
http://www.youtube.com/watch?v=BXt0EbDOPDU&feature=related
2. Yoshikazu Mera, Japanese countertenor
http://www.youtube.com/watch?v=zNbbVHnTecw
3. Dmitri Hvorostovsky -baritone
http://www.youtube.com/watch?v=h0PcHEdSpnA&NR=1
4. Jennifer Larmore -mezzo-soprano
http://www.youtube.com/watch?v=M_m6mnMIofc
5. Cecilia Bartoli - Ombra Mai Fu (FULL)
http://www.youtube.com/watch?v=MugXdU-h6UU
6. Marilyn Horne with scores
http://www.youtube.com/watch?v=If7II3ksnbE
7. Andreas Scholl with English subtitles
http://www.youtube.com/watch?v=dHp5_sNurag
8. Philippe Jaroussky -countertenor
http://www.youtube.com/watch?v=5v3llijUN6Y
