Miley Cyrus
The former Disney star's birth name is really Destiny Hope Cyrus. Her stage name comes from a childhood nickname because she was always smiling around the house. Her family called her "Smiley," which eventually turned into "Miley." However, she legally changed her name in 2008.
Cardi B
Though she goes by Cardi B professionally, the "Bodak Yellow" singer was born Belcalis Almanzar. "B" is short for Bacardi, like the brand of rum. Her sister's name is Hennessy, "so everyone used to call me Bacardi, and I started calling myself Bacardi, which eventually was shorted to Cardi B," she told Jimmy Fallon.