Carey looked incredible, rocking her signature '90s curls—a look that made her a trendsetter back in the day—showing that her hair still holds ... then accompanied Mariah to the iHeartRadio ...

Mariah Carey's daughter is more and more her total ... wearing an off-the-shoulder black dress and with her typically curly hair straightened, singing Julia Wolf's "In My Room," and in another ...

Mariah Carey's only daughter Monroe ... who had his arm around her neck. Monroe's dark hair, which is naturally curly, was straightened and cascaded well past her shoulders.