People saying no when the costumes look exactly alike, especially the second People saying no when Ariana is self proclaimed Beyoncé stan
She was also influenced by the white pearl outfit.
She's still using the same design in her latest performances.
Ya it's kind of hard to ignore.
Usually I think that putting two images side by side to prove that there is some copying going on is really just fantasy…like when J.Lo fans love to pull out their library of common outfits... you're going to see the similarities when they are there right next to each other, but these are SUPER similar. It's not just like "wearing camp cargo pants" it's "wearing a red cutout leotard with geometric shapes and sparkles"
Bey is one of Ari's inspirations. She's just taking inspiration from one of her faves
This. I'm not mad about it at all. Ariana is still up-and-coming and I really wish her an amazing career like Beyoncé's. But it is delusional to not see the similarities.
The same black leotard ballet dancers have been using for classes/rehearsal for centuries?
Yes. A black leotard. The same black leotard that has been used over and over by celebrity and GP alike to reference the video. Please, don't cloud your judgment with a desire to put Beyoncé down. It's incredibly transparent and certainly not getting you anywhere because your logic doesn't make sense. For example, there have been many more girls in schoolgirl outfits than there ever have been girls in black leotards, but that does not mean that it is not an iconic look for Britney? No.
People saying no when Ariana is self proclaimed Beyoncé stan 
because Beyoncé is NOT a Fashion Icon and a Legend!!
T but they are similar