Singer has severe allergic reaction to antibiotics
Also, she sings a bunch of songs
The "Unconditionally" singer outsells all women in 2013 -- including Miley Cyrus
The Monteith tribute was the first "Glee" Top 10 since 2011
The pop star is coming at the competition like a Wrecking Ball
Clearly, the new album marks a transitional phase in the pop star's career -- but does it sing?
She really likes that sledgehammer