She hasn't, but no one should doubt her skills just because of that.
P!nk has 1, count them, 1 #1 single. Are you telling me she is a bad artist.
Umm, actually I love Nicki and I have said many times she is my fave ever rapper, so calm down. but saying featuring her on a song shows your desperate for a number 1 is a bit odd, since she hasn't even had one.