Don't forget that this was before her debut and this way before she started wearing severe make up... WHILE Kahi was intentionally making a selca, in other words... She is aware of how she looks like on the picture. Another thing is... Gaga's Italian, while Kahi's Korean, which makes a difference. Since Asians look younger in their teens-thirties, but start to deteriorate in youthfulness during their forties... While caucasians tend to have a more gradual process of aging.

HOGOSH KAHI LOOKS LIKE A TEEN ~ LOL OR IN EARLY 20s.. for Pete's sake! I LOVE KAHI SO MUCH <3

I think that's a bad pic of LG.