They're both fashion icons with different types of impact on the fashion industry, but still made impact. I can see why either answer would make sense.
Rihanna. Who is trying to dress like Gaga? And where is her fashion line?
The fashion line is a weak argument since Rih's line was a disastrous flop. It wasn't a success at all. Her fashion show was a massive ratings failure as well. I like Rih but truth is truth.