As if we needed a reason to be even MORE jealous of these two!
[Image via WENN.]
But so far, so good — and by so good, we mean so safe as the Problem songstress teased the performance with this sexy, basic black look.
While she kept her long locks tied up in her usual style, Ariana switched things up with a crop top, skinny jeans, and patent leather, knee-high boots.
Ow ow! Wonder what she'll step out in tonight!!
[Image via Pacific Coast News.]