Creep - TLC
Nice and Slow - Usher
Always Be My Baby - Mariah Carey
Fantasy - Mariah Carey
Sometimes - Britney Spears (why not lol)

If I had to pick only from Gaga's discog:

Bad Romance
Paparazzi
Marry the Night
Government Hooker
Heavy Metal Lover

Kelly Clarkson
Catch My Breath
Since U Been Gone
Sober
Because of You
My Life Would Suck Without You

Standing On The Sun, Jealous, Love On Top, Disappear, Get Me Bodied

Carrie: Blown Away, Relapse, Just a Dream, Wasted, Someday When I Stop Loving You 1 from each album
Ellie: My Blood, Explosions, I Know You Care, Your Song, I'll Hold My Breath
Kelly: Because of You, Behind These Hazel Eyes, Since U Been Gone, Someone, You Love Me
Adele: Million Years Ago, Someone Like You, Make You Feel My Love, Right as Rain, When We Were Young
Lily: 22, The Fear, L8 CMMR, Friday Night, **** You
P!nk: Who Knew, Glitter in the Air, U + Ur Hand, **** Like You, Bad Influence

How tf did I leave out Catch My Breath in my list? Let me revise

Frozen, Borderline, Like a Prayer, Holiday, Justify My Love

Bad Romance, Poker Face, TEOG, Marry The Night, Alejandro

Katy Perry - Teenage Dream, Thinking Of You, E.T., Walking On Air, Hot N Cold

Britney: Work Bitch, Circus, Breathe On Me, Outrageous, Everytime

Jlo: Booty, Get Right, Good Hit, Step Into My world, I'm into you

Beyonce: Flawless, Startover, Freakum Dress, That's why you're beautiful, Crazy In Love (This one was hard)

Beyoncé
Drunk In Love
Mine
Love On Top
Dance For You
Sweet Dreams

Aaliyah
Try Again
We Need a Resolution
Enough Said
Hot Like Fire
Are You That Somebody?

Destiny's Child
Say My Name
Independent Women
Jumpin Jumpin
Lose My Breath
Survivor

Britney: Everytime, ...Baby One More Time, Toxic, Breathe On Me, Touch of My Hand
Katy: One of the Boys, If You Can Afford Me, Thinking of You, I'm Still Breathing, Waking Up in Vegas
Lana: Ride, Born to Die, Freak, Video Games, Florida Kilos

Mariah
I Am Free
Vision of Love (MSG 95)
Someday (Thanksgiving 93)
Breakdown
Can't Let Go

Adele
Hometown Glory (RAH)
I'll Be Waiting
Make You Feel My Love (RAH)
Rolling in the Deep
Water Under the Bridge

Brandon Flowers
Dreams Come True
Lonely Town
Diggin' Up the Heart
Between Me and You
Magdalena

I love all of those songs but sis.