Aside from Trent's hate for Rihanna, the reason why she is always brought up is because they are similar in sound and style. Willow's very open about having Rihanna as her idol and she clearly channels her a lot. What's mind-boggling is that Rihanna is a grown woman and Willow is just a kid trying to copy Rihanna yet she can do a lot better than her idol. She sings better than Rihanna and has a lot of natural talent than RiRi.

You all might say she will never be as successful as Rihanna or whatever. That could be true, but that doesn't take away the fact that a kid can outdo her idol with her own style.