Amal Clooney, Cindy Crawford and Kim Kardashian at Casamigos Halloween event

Amal Clooney attends Casamigos Halloween Party on October 27, 2017 in Los Angeles, California. (Getty Images)

Kim Kardashian and Jonathan Chaben dress as Sonny and Cher. (Instagram)

Amal Clooney, 39 posed alongside supermodel Cindy Crawford, 51. (Getty Images)

Amal Clooney, Rande Gerber and Cindy Crawford attend Casamigos Halloween Party on October 27, 2017 in Los Angeles, California. (Getty Images)