Mariah Carey & Katy Perry are all smiles...

Remember this? Katy Perry seems to have forgotton her remarks while stanning for Mariah Carey backstage during the legend's show at Caesars Palace recently:
Bosom buddies huh? It all looks a bit fake to be honest, but I'm glad Mariah has younger artists eating their words just by showing themselves. As a new school artist, respect the legends that were here before you.