Firing people that disagree with her

For Katy: Her inability to be taken seriously, and her inconsistent vocals.

Nicki: Her personality has made her infamous, and her behavior on Idol didn't help.

Rihanna: Her overly sexual image has set her back a bit, and cheapens her music.

What other people think of her.

Miley: Her constant craving for controversy
Sky: Her social anxiety

Becomes pregnant easily.

Beyoncé's perfection makes her a target for people who stan for less talented girls

And not letting her music speak for itself.

Her poor hip.

Beyonce's care for single success in regards to promotion or even acknowledgment

It isn't really an issue other than I want more live crazy performances ala RTW at BBMA

The Complete My Album feature.

Piqué

Gaga: her stubborness
Adam: his dancing skills He could hire a coreographer, but it seems he doesn't care
Nelly: her nasal voice. She should make more music in which her voice doesn't sound so nasal (like pretty much all songs in Loose)
Ashley: her stage presence
Anitta: she's TOO sincere sometimes and many people don't like her for that

Miley is stubborn, indecisive, and her work ethic comes and goes in the blink of an eye.

Charli is pretentious.

Ciara has no identifier in her music; almost anybody with an urban flair can sing her songs and better...

Crystal; she's virtually unknown and has no sense of control in her music.

Perfume; high squeaky voices run by Nakata's leash with no room for growth.

I guess live singing for Britney and certain lives for Katy as well.