I don't know about the most beautiful song ever, but I know the most horrible song ever:
"I will always love you" as sung by Whitney Houston. "IIIIII-EEEE-IIIII-EEEEE-IIIII will always..." It sounds like two cats in heat in a fight.
She absolutely destroyed the great rendition done by Dolly Parton, plus she opened up the door to Fantasia Barrino, easily the worst singer in the history of the world. Who decided that screaming at the top of your lungs and throwing in an overdone, harsh trill sounds good? I had to cover my ears every time she sang on Idol last year. She must have slept with Simon to win...or was it Paula, since she likes to sleep with contestants?