In reply to Slaymar.

The difference is that Flawless was filmed around the time Pour it Up came out and those shorts were just one of many costumes in Pour it Up, so it's easier to believe in coincidence whereas Beyoncé's plaid was her only Flawless costume and she continued that look onto her tour as well. Thus, it's more distinct to her.

Nothing in this world will be seen as completely original, but if you make something your own then it's easier to say it was a copy.