"Brave" debuted and peaked at #61 on the Hot 100 and it was released months ago, it's dead.
The GP won't even notice it since it's debut was probably thanks to the fans buying the song which means is pretty much unknown and I'm sure it was pretty much (not completely) unknown to a lot of ppl here but all of a sudden everyone knew about "Brave" and OMG HOW COULD SHE DO THAT? BRAVE IS THE SUPERIOR SONG when they just found out about it because someone noticed the similarities
& yes Katy was kind enough to tweet about the song, but let's be real, Sara needed that much needed promo and I wouldn't be surprised if a lot of the sales for her song came from the tweet so in my head, I know Sara gave Katy the 'go' to "sample" the song.