If were talking PERRRRFECT than its gotta be:

BRITNEY - BLACKOUT
In The Zone
Marina - Electra Heart
Kylie - Fever
K$ - Warrior
Madge - Confessions
Ray Of Light
GaGa - The Fame Monster

I feel really torn also. I want to include Beyonce. I like MOST of her discog but I can honestly say I have never enjoyed a FULL Beyonce album.

Blackout, The Fame Monster, and Madonna.

2012's best pop album. "Never Close Our Eyes" is one of the best pop singles of 2012.
Trespassing is a cohesive album with great vocals, great hooks, great lyrics and great production.
There are lots of perfect pop albums (Kylie Minogue's Fever, for exemple), but I decided to focus on Trespassing because it's recent and unfairly underrated.

Blackout

Girls Aloud - Tangled Up.

Breakaway

Breakaway
Teenage Dream
The Fame Monster
Ceremonials
B-Day
Emotions
Daydream
Animal

Teenage Dream

Yes, I'll mention this masterpiece as it is the most mentioned album on this thread and will make the haters continue seething.

Circus is also one of the most perfect POP albums ever and it's not even my favorite Britney album but it's full of safe pop songs.

Kiss, Teenage Dream, Sticks And Stones

Kiss, The Fame Monster and Ray Of Light.

1. Christina Aguilera - Stripped
2. Madonna - Confessions On a Dance Floor
3. Britney Spears - Blackout
4. Rihanna - Loud
5. Christina Aguilera - Lotus

Loose, L.A.M.B., Stripped & B'Day.

L.A.M.B.
The Fame
Teenage Dream
Animal
Blackout
Good Girl Gone Bad
FutureSex/LoveSounds
Confessions
The Emancipation of Mimi
B'Day
Halcyon
With the Music I Die

Hun, Breakaway has been the most mentioned album.

Oh and Deee-Lite's World Clique if you count it as 'pop'.

Kiss is probably one of the top albums of 2012 and a pop classic tbh. It's just Carly's name that puts everyone off from trying to listen to it and that she's known as the Call Me Maybe girl