Exactly. Alot of this information you cannot find online from a good source but you can still find on these singers' albums. Like if you want the list i can put it here: 

Christina AguileraTABC#7, G6, F#6TABThe Christmas Song, What A Girl Wants Live, Soar

Toya AlexisTAB        G6TABI Believe In You And Me

Vanessa AmorosiTAB        E6TABI Wanna Be Your Everything

Erykah BaduTAB        D6TABStay

Philip BaileyTAB        F6, E6TABReasons Live, Devotion Live

Shoshana BeanTAB        A6, F6, G#6TABAin’t No Way (Live),  I Believe In Love

Tamar BraxtonTAB        D7TABMoney Can’t Buy You Love

Sarah BrightmanTAB        E6TABAngel of Music

Georgia BrownTAB        F8 TABNone

James BrownTAB        E6TABThe Payback

Kandi BurrussTAB        Eb6, D6TABMy Little Secret, Understanding

Tisha Campbell-MartinTABG6TABNone, Don’t Ask My Neighbor

Blu CantrellTAB        Bb6TABWaste My Time

Mariah CareyTAB        G#7TABEmotions Live

Kelly ClarksonTAB        F#6TABNatural Woman Live

Sarah ConnorTABTABC#6     From Sarah With Love

Marcella DetroitTABF6TABStay

Howie DoroughTAB        A6TABAll I Have To Give

Ashanti DouglasTAB        Eb6TABNational Anthem

Terry EllisTAB        F6TABDon’t Go

Rachelle FerrellTABE7, D7TABWith Open Arms, It Only Took A Minute

Lisa FischerTAB        G6TABHow Can I Ease The Pain

Willa FordTAB        G6TABOoh Ooh

Rosie GainesTAB        E6TABDiamonds And Pearls

Cheryl “Coko” GambleTABE6TABDowntown

Nina GiradoTAB        E7TABSimula

Rachelle Ann GoTAB        C7, G6TABVision of Love Live, Dreaming of You

Al GreenTAB        D6TABI Can’t Get Next To You

Vivian GreenTAB        E6TABFrustrated

Cleo HigginsTAB        F#6TABA Touch of Love

Whitney HoustonTAB        G6TABI Wanna Dance With Somebody live

Jennifer HudsonTAB        B6TABNone

Janet JacksonTAB        D6TABHe Doesn’t Know I’m Alive

JoJoTAB                E6TABToo Little, Too Late

Beyonce KnowlesTAB        E6, D6, C6TABHappy Face, Cater 2 U, Emotion (Live)

KylaTAB                B6TABSomeday

Patti LabelleTAB        Eb6TABLady Marmalade live

Rachael LampaTAB        C6TABShaken, Ave Maria

Amel LarrieuxTAB        F#6TABFor Real

Cyndi LauperTAB        E6TABWhen You Were Mine

Adam LopezTAB        Bb8, Eb8TABAudio Clip, Nessum Dorma

Lani MisaluchaTAB        A6, G#6TABI Will Always Love You Live, The Diva Dance Live

MISIATAB                F6TABLoving You live

Chante MooreTAB        B6TABWey U

Debelah MorganTAB        Bb6, A6TABFall In Love Again, I Remember

Monica NaranjoTAB        C6TABChicas Malas

Minnie RipertonTAB        D7TABWe’re Going Wrong

Nicolette “Nikki” PalikatTABF#6, F6, E6TABPinta, Emotions Live, Caramu, Emotion Live

Nicole ScherzingerTABG6, F6TAB100 Words,

Jill ScottTAB        C7, D6TABSpring Summer Feeling, Gimme

Jessica SimpsonTAB        G#6, F6, E6TABNone, Your Faith In Me (Live)

Angie StoneTAB        D7TABGroove Me

Yma SumacTAB        C#7TABChuncho

Steven TylerTAB        E6TABCrazy (Aerosmith)

Regine VelasquezTABF6TABMore Than Words Can Say

Angela ViaTAB        C7TABPicture Perfect

Sebastian VilasTAB        A7, G#7TABYoutube Video

Martha WashTAB        F6TABIt’s Raining Men

Barbara WeathersTABF6TABIf Your Heart Isn’t In It

Deniece WilliamsTABG6TABEvery Time He Comes Around

Shanice WilsonTAB        A6TABBreathe Again

Angela WinbushTAB        E6TABSettle Down

Betty WrightTAB        F7, G6TABNo Pain, No Gain Live, Album

YaZarahTAB                E6TABBaby

Jane Zhang LiangyingTABG6, F6TABLovin’ You

And most of them were on the list. You can get these songs anywhere. I get them feom Limewire or Comcast Rhapsody if I can't find it. Youtube also has some songs too. That's how I know they aren't hoaxes because there are CD recordings. And the ones you don't have access to their CD's, have websites. It just takes some cummunication and research.