Temptations:
Papa was a Rollin' Stone (Undisputed Truth)
Love Woke Me Up This Morning (Marvin & Tammi)

Supremes & Temptations:
I'm Gonna Make You Love Me (Dee Dee Sharp)
Sweet Inspiration (Sweet Inspirations - smh @ me)
I'll Try Something New (Miracles)

Jackson 5:
Who's Lovin' You (Miracles)
Born to Love You (Temptations)

Whitney Houston:
I Believe in You and Me (Four Tops)

Undisputed Truth:
Smiling Faces Sometimes (Temptations)

Aaliyah
At Your Best (You are Love) (Isley Brothers)

Beatles:
Twist & Shout (Top Notes/Isley Brothers)

Supremes:
Someday We'll be Together (Johnny & Jackey - http://www.youtube.com/watch?v=MuJ_zWKPuzA. "Johnny" (Bristol) is the gruff sounding producer heard coaching Diana through her vocal on the so-called "Supremes" hit version)

Carl Carlton:
Everlasting Love (Robert Knight)

Diana Ross & Marvin Gaye:
You Are Everything (Stylistics)
Stop, Look, Listen (To You Heart) (Stylistics)

Marvin Gaye:
I Heard It Through the Grapevine (Gladys Knight & the Pips - well, there's was the first of three previous versions to come out).