A girl by the name of Regan first appeared attempting suicide and saved by Superman in the famous scene in All Star Superman #10. A few years later, in Superman 701, Superman attempts to talk down a girl named Felicity Rose from committing suicide. A few years after that, pop star Glory Miau is introduced in Batman/Superman #16 and given the real name Felicity Regan. Thus, Glory Miau can be seen as an amalgamation of the girls from All Star Superman and Grounded with a New 52 spin on the character.
