I'm not sure which version you like or you can hear the difference.
Lucia Popp : Im Abendrot (Richard Strauss)
http://www.youtube.com/watch?v=KEh_OP66Vik
Renee Fleming - Strauss' 4 Last Songs - Im abendrot
http://vodpod.com/watch/4173161-renee-fleming-strauss-4-last-songs-im-abendrot