Perfect Illusion (albeit in the worst possible measure of "risky"). I don't think Work was a risk for Rih; even if it didn't take off with pop, urban support and streaming would've kept it afloat and still given it respectable Hot 100 presence regardless. I don't get why stans equate risk with impressiveness tho; it's not always a good thing and it doesn't indicate quality one way or another.
Perfect Illusion because its bad and her vocals are annoying therefore its risky because it would've taken some sort of gaga-positive miracle to make that song succeed.