The male voice is Josh Groban, I don't know the female voice.
It has been recorded by many different singers, though probably the Bing Crosby or Frank Sinatra versions are the ones most often heard.
Pomplamoose
I don't know their names but they are legitimate opera singers.
pomplamoose
The radio commercial sounds like Amos Lee, but I'm not sure.
John Grady plays George Washington
they sang i like to teach the world to sing on the coca-cola commercial.
Singers can use their talents on the stage [soloist, chorus etc], choir and also for commercial recording, broadcasting, in advertising, on the concert circuit, in clubs etc.
The name of the choir is - The Selected by God Choir who have a song out called Lose Yourself.
It's a remake of the 1958 single by The Chordettes.
It sounds like Steven Curtis Chapman.