1. Justin Bieber
2. Miley Cyrus
3. Nicki Minaj
4. Rebecca Black
5. Lil Wayne
6. Taylor Swift
7. Lady Gaga
8. Ke$ha
9. Selena Gomez
10. Britney Spears
12. Ariana Grande
13. Katy Perry
16. Rihanna
29. Madonna
34. Lorde
36. Demi Lovato
39. Meghan Trainor
43. P!nk
74. Adele
79. Christina Aguilera
This site is very famous, with hundreds of thousands of votes, so I think it's reliable enough to see who the geepee thinks is a good singer and who the geepee sees as a complete joke. http://www.thetoptens.com/worst-singers/
This is who the geepee sees as a bad singer. Which means that some singers with a good voice are seen as trash because of their gimmicks and image, which is sucy a pity.
Justin can sing though... And this is coming from a Stan turned casual fan turned hater turned GP. So can Miley. Selena is weak though (I bought 2 copies of revival) BUT she has gotten 10000x better. Taylor's pretty weak ngl