Rihanna:
MOTS: Rush & Let Me
AGLM: -
GGGB: Good Girl Gone Bad & Sell Me Candy
RR: Fire bomb
LOUD: -
TTT: Do Ya Thang & Farewell
UA: Jump & Lov7 Song

Nicki:
PF: Roman's Revenge
PF: RR: Champion
PF: RR: TRU: -

What about your faves

I'll find out when my fave moves on

As for others.. I think Selena had a hit left from Stars Dance.
Iggy might be paying dust to a work re-release, so I guess that can count too

You forgot Skin sis

The Fame: Starstruck, The Fame, and Boys Boys Boys
TFM: Monster, Dance in the Dark
BTW: Scheisse, Bloody Mary
ARTPOP: Gypsy

The Fame - Starstruck
TFM - Monster (although anything on that album could've gone Top 10)
BTW - Scheisse could've done well, I think
ARTPOP - Gypsy

The Fame: Boys Boys Boys
TFM: Monster
BTW: Scheisse...maybe
ARTPOP: Gypsy

One of the Boys: If You Can Afford Me
Teenage Dream: Hummingbird Heartbeat, Peacock
PRISM : Legendary Lovers, Walking on Air

Glorious : Night Owls Early Birds

Kelly:
Gone
You Found Me
Don't Let Me Stop You
You Can't Win
Let Me Down

Gaga:
STARSTRUCK
Monster
Scheisse
Gypsy

Most of BTW tbh

Emotions - You're So Cold
Music Box - Now That I Know
TEOM - Fly Like a Bird
EMC2 - Migrate

Lorde - Buzzcut season, 400 Lux

OOTB - OOTB (song)
TD - Hummingbird Heartbeat
PRISM - she will pay It Takes Two dust.

Iggy and her team are making a terrible mistake by not rereleasing Work.

Ciara- Livin It Up

Rih:
Let Me
Kisses Don't Lie
Breaking Dishes
Good Girl Gone Bad/Sell Me Candy/Push Up on Me
Fire Bomb
Te Amo (US)
Fading
Drunk in Love
Jump
Lost in Paradise

Demi:
Trainwreck
Got Dynamite
All Night Long
Unbroken
Two Pieces

Ellie:
Animal
Your Biggest Mistake
My Blood
Your Biggest Mistake

Cheryl Cole:
Happy Hour
Waiting
Everyone
Yeah Yeah
Screw You
Sexy Den a Mutha
Make You Go

TF\ Starstruck
TFM\ Everything on that album would've been a hit anyway
BTW\ None! She did great with the singles.
ARTPOP\ Gypsy, Venus.

Let Me Down is the bomb!!!

Turning Tables could have done well