I went and found a few:
Ayu:
A BALLADS
Duty
I am...
ayu-mi-x III Acoustic Orchestra Version

Britney Spears - Circus
Lady GaGa - The Fame + Monster
Namie Amuro - Queen of Hip-Pop + PLAY
Ayumi Hamasaki - GUILTY + I am... + RAINBOW
Jennifer Rostock - Ins offene Messer + Der Film

waaaaay too many to count. :no

i laready said mine some time ago. not trying ot think of them again (not that i could think of all in the first place)

but i totally forgot Eiko Shimamiya
and her albums O and Hikari Nadeshiko
those have to be the easiest albums in the world for me to sit down and listen each song
even moreso than hikki and ayu who are my top favs

Adding all Kuu's album & M.I.A. album~

If you haven't heard of M.I.A., seriously, download Arular & Kala :D

I love you. <3

Yeah, mine would be;

LOVE COOK - Ai Otsuka

Comatose - Skillet

RAINBOW - Ayumi Hamasaki

Songs for you, Truths for me - James Morrison

X&Y - Coldplay

Since I'm listening to it right now, I'd say OLIVIA - The Cloudy Dreamer :D

Almost all of Ayu's albums. And that's one of proofs why she's my favourite music artist overall.

Oh, and BoA's Girls on Top and OUTGROW - definitely her best albums.

Adding 2NE1's mini album to my list :D

I'll add

Namie Amuro - BEST FICTION
Ayumi Hamasaki - I am...
Ayumi Hamasaki - MY STORY
Tommy February6 - Strawberry Cream Soda Pop "Daydream"
Tommy Heavenly6 - Gothic Melting Ice Cream's Darkness Nightmare
Paramore - The Final Riot

Oh and I forgot Ayumi Hamasaki - NEXT LEVEL since I can finally stand LOVE 'n' HATE and Rollin'

Here's my long list. :D

Ayumi Hamasaki
LOVEppears
Duty
Memorial address
ayu-mi-x non-stop megamixes 2-5
ayu trance 1-3
ayu-ro mixes 1-3

Koda Kumi
affection
grow into one
feel my mind
secret
BEST ~seecond session~
Black Cherry
Kingdom
TRICK
UNIVERSE
Driving Hit's 1

Utada Hikaru
First Love
Distance
DEEP RIVER
ULTRA BLUE
HEART STATION
This Is The One

Namie Amuro
SWEET 19 BLUES
Concentration 20
181920
GENIUS 2000
break the rules
LOVE ENCHANTEND single collection
STYLE
Queen of Hip-Pop
PLAY
BEST FICTION
PAST<FUTURE

Mariah Carey
Memoirs Of An Imperfect Angel
Emancipation Of Mimi
E=MC^2
Charmbracelet
Butterfly
Rainbow
Daydream

Mai Kuraki
delivious way
PERFECT CRIME
FAIRY TALE
If I Believe
FUSE OF LOVE
DIAMOND WAVE
ONE LIFE
touch Me!
ALL MY BEST

BoA
IDENTITY
THE FACE
MADE IN TWENTY (20)
Outgrow
Love & Honesty
BoA
BEST&USA

Kelly Clarkson
Breakaway
My December
All I Ever Wanted

Ami Suzuki
SA
infinity eighteen vol. 1
INFINITY EIGHTEEN VOL. 2
FUN for FAN
AROUND THE WORLD
AMIx WORLD
CONNETTA
DOLCE
Supreme Show

Others

Lady GaGa - The Fame Monster
Leah Dizon - Communicaton!!
Leona Lewis - Spirit
Hanna Pakarinen - Stronger

Albums here are chosen with very deep consideration. I chose only the albums I felt like I can listen through without even thinking of skipping any tracks. You may feel surprised that (m)u isn't here because I love the album. Even though it's my favourite Ayu album there's still few songs I'm tired of listening. *coughladiesnightcough* ^^'

Circle ~ Kimura Kaera

Trip ~ Rina Aiuchi

Yesterday and Today ~ The Beatles

Ignition ~ Sex Machine Guns

BY2 ~ Twins

The 5th Album ~ Angela Chang

The Groove In Me ~ Emme Wong

Black Cherry ~ Koda Kumi

18 Eighteen ~ Nana Kitade

7 Flowers

Se7olution ~ Se7en

Doubtst ~ Moon Kana

5TH Story Roman ~ Sound Horizon

Jpop Love Hold Me In your Arms ~ Various Artist

Kokusyoku Simire 2 ~ Kokusyouku Simire

Summer Dayz ~ Tiger

It's so many to mentioned, so I'll go with Japanese albums only..

YUI - Can't Buy My Love & My Short Stories
Utada Hikaru - First Love, Distance, & This Is The One
DEPAPEPE - HOP! SKIP! JUMP!
all albums of Ayu.. I never remember I skip some tracks when I played Ayu's songs LOL

adding UNIVERSE by Kuu. I never wanted to skip this album. just sometime for Stay I wanna fast forward it after 1st chorus end

ALL OF AYU ALBUMS.

Lady Gaga - The Fame Monster
Hamasaki Ayumi - A Song for XX
Hamasaki Ayumi - A BEST

I'll name a few. My music selection is so broad and all across the board of genres.

MCR - Black Parade
MCR - 3 Cheers for Sweet Revenge
Any mixes or albums by Freddie Joachim - I highly recommend this guy if you are into Jazz fused with Hip Hop. If you listen to Nujabes, you'll like this guy.
Passion Pit
Roisin Murphy - Overpowered
Daft Punk - Discovery
Black Kids - Party Traumatic
MGMT - Oracular Spectacular
Anything Beatles
Born Ruffians - Red, Yellow, & Blue
Justice - Cross
The GO! Team - Thunder, Lightning, Strike
VersaEmerge - VersaEmerge
Saosin - Saosin
Lauryn Hill - Miseducation of Lauryn Hill
Kurupt - The Streetz Iz a Mutha
2pac - All Eyez on Me
The Roots Crew - Home Grown!
Chemical Brothers - Push The Button
Perfume - Game
Prodigy - Always Outnumbered, Never Outgunned

Ayumi Hamasaki - A Song for XX
Ayumi Hamasaki - Duty
Ayumi Hamasaki - LOVEppears
Utada Hikaru - ULTRA BLUE
:)