Switzerland?
Celine Dion first got recognized on an international scale in the ‘80s. In 1982, she won the Yamaha World Popular Song Festival. In 1988, she won the Eurovision Song Contest. She represented Switzerland both times.
Caesars Palace
During the height of her career in 1999, she wanted to go on a break so that she can spend some time with her husband after he got the diagnosis. After coming back in 2002, she signed a contract to perform at The Colosseum at Caesars Palace on a nightly basis.