Before getting up on stage at Taylor Swift [1]'s LA concert, we imagine Selena Gomez [2] had a quick convo with her stylish bestie [3]. "What should I wear?" we can hear her asking Tay. "Are you still wearing that white set? Should I wear my black bodysuit and then we can match?"

Apparently, the 23-year-old was given the nod of approval, because that's exactly what went down: Selena strutted her stuff while rocking a formfitting black number and Stuart Weitzman thigh-high boots, an outfit that pretty much mirrored the sparkly white and black costume [4] Taylor's worn throughout her 1989 tour. And while the two performing "Good For You" together is something Selena "can't wait" to tell their kids about [5], we think this impeccable take on BFF style is also pretty noteworthy. Scroll through to see their looks, then watch a quick clip of this must-see performance.

Selena joined Taylor on stage in a sparkly black bodysuit and thigh-high boots.

The look matched the white and black costume Taylor's rocked all tour long, but Selena wasn't the only one to channel Ms. Swift on stage. Ellen DeGeneres [6] recently made an appearance as well, copying the singer's fringed bodysuit in a similar outfit [7].

BFF style: nailed it! We're also enjoying Selena's statement choker.

These girls look FIERCE.