we had a year where all the big artist fall hard as a rock.
for example:
Lady Gaga in 2011 selling 7M WW and in 2014 2.5M
Kesha selling with her debut over 6M copies and her last album isnt even 1M ww
Justin Bieber had very big numbers with believe but Journals isnt even 500k WW
Jennifer Lopez had one of the biggest hit in 2011 and the biggest female video of all time and now she is no where near to it
Jessie J had a very big debut but now she is just over
Britney Spears has the biggest career off the young female artists and her last album is 500k ww

for you which one was the worst?

Bieber, I think.

Lady Gaga without a doubt

Ke$ha sold 6million? That's news to me...

This is Gaga vs Justin B. People dont use Jessie and JLo and they dont expect much from Britney and Kesha.

Kat DeLuna

Gaga's "downfall" is the most talked about because so many people got insecure and jumped ship whilst others were happy to not see her on top.

However, Jessie and Ke$ha's downfalls must hurt more.

Britney and JLo aren't bothered.

Bieber ... well...

id say Gaga or Bieber. one second they were slaying, the next they were doing the complete opposite. Jessie J still does well in the UK. I have no idea about J LO or Kesha and Britney's flop era was completely expected considering the lack of promo, radio play and mediocre music.

Between Bieber and Gaga but I think Gaga's because it was down to lack of interest and it was surprising just how much she turned people off.

Kesha sold 6m? really?

bieber definitely he went from slaying to totally flopping in a year. At least gaga actually sold some copies of artpop

Gaga and Brit.

Animal sold 3.5m at most, what kind of inflation

jessie is still doing well in UK & Australia so she is not "done"

Gaga and Bieber.

At least kesha had a #1 this year thats sold 7 million WW like lol

Jessie J's old songs are still kind of popular but her new album is unnoticed here lol

Gaga or Bieber. Their fanbases are/were huge and both were coming off of or back from huge eras. A shame considering both ARTPOP and Journals were some of the best pieces of work, Gaga and Justin had put out so far in their career.