How about three examples.. I sang a duet version of Melanie Safka's song Save The Night with a lovely girl called Jane. At the end of the song there were many wet eyes and gulity looks on some faces in the audience.

On another occasion I was singing the Prisoners Chorus to Beethovens Fidelio, just at the same time news came in of the release of some hostages. I can recall feeling exactly what Beethoven was trying to put into music and words, the emotion of prisoners given some freedom. Translated from German to English ..Oh Welche Lust. Gefangenenenchor (Fidelio) Prisoners Chorus

Oh what pleasure to breathe
The open air of freedom
O what pleasure! here alone is life
The prison is a tomb
We will with trust
build on Gods help
Hope whispers
softly to me
that we shall be free
and find peace
O heaven deliverance
what hapiness
O freedom you return
Speak softly
hold back
We are overheard
and spied on
O what pleasure