My last good band had two female vocalists. Here's a set list I just found yesterday with the songs the ladies sang.
1st Set
Get Ready (Temps)
Gimme Shelter
Gotta Serve Somebody (Dylan, we learned it from something with Booker T & The MG's)
Rock Steady (Aretha)
Son Of A Preacher Man (we worked from both Dusty Springfield and Joan Osborne)
Think (Aretha again)
Use My Imagination (Gladys Knight)
Knock On Wood/In The Midnight Hour (Eddie Floyd/Wilson Picket)
Crossroads (yeah, Robert Johnson via Cream)
Who's Makin' Love
RESPECT (Aretha)
Set 2
Down Home Blues (ZZ Hill?)
Midnight Train To Georgia (Gladys)
Proud Mary (Ike & Tina's version was the starting point)
Sweet Home Chicago
Chain of Fools (Aretha)
Beast of Burden (Stones)
Runaway (yeah, the old Del Shannon song, but listen to Bonnie Raitt's version)
I'm Losing You (Temps)
Love and Happiness (Al Green)
I Feel Good (GFOS)
Soul Man (Sam & Dave, Blues Bros.)
Brown Sugar (yes, a black woman wanted to sing this one)
Set 3
I've Got The Music In Me (Kiki Dee)
Give Me One Reason (Traci Chapman)
Can't Get Next To You (Temps again)
Play That Funky Music (Wild Cherry?)
I Will Survive (Disco at its "get the young girls out there shaking nubile young flesh" best!!)
Let's Stay Together (Al Green)
Come Together (The Beatles, but I think the drummer was coming from Joey Kramer more than Ringo)
It's Only Rock 'n' Roll (Stones)
You Can Leave Your Hat On (Joe Cocker et. al.)
Closing Medley of "Life In The Fast Lane" (the Eagles) then "Thank You (Falletine Me Be Mice Elf, Again)" (Sly & The Family Stone), then "We Want The Funk (Tear The Roof Off...)" by P-Funk.
Dig into early Bonnie Raitt, Delany & Bonnie, and Joan Osborne stuff. Dig up some Shamekia Copeland, Johnny Copeland's daughter and find some stuff by Saphire, The Uppity Blues Women. Don't be afraid to cover songs traditionally sung by men.
John