I don't think so.
But give them a taste of their own medicine sis.
I don't think Lady Gaga necessarily copied Rihanna. But this is the sort of threads Lady Gaga fans start about other artists supposedly copying her, so hopefully her fans can see how stupid it is now.
Rihanna was one of the first people to have dance-pop hits in years (and she did it a long time before Lady Gaga), but I think the dance-pop revival would've happened anyway because Nelly Furtado and Justin Timberlake were still going to release their albums.