People voting for Katy Perry are obviously pressed/little monsters. She caused controversy with "I Kissed a Girl" and had one of the most successful eras with "Teenage Dream". She's an icon, like it or not.
People voting for Avril Lavigne were probably using diapers in 2002-2003. Every pre-teen girl wanted to be like her and she had hits.
Pink is third place and I kinda agree with it, because she's never been on people's mouth or had memorable songs.
But out of those, it's easily Jennifer Lopez.
![Bibliotheque](http://img.photobucket.com/albums/v232/korn0818/ATRL_Smilies_All/atrlers/biblio_zps23dff242.gif)
Absolute zero impact.
Edit: And Nicki Minaj too.
![Bibliotheque](http://img.photobucket.com/albums/v232/korn0818/ATRL_Smilies_All/atrlers/biblio_zps23dff242.gif)