I compiled a list of Meshell's cover songs and the albums they are featured on this evening and came up with the following, am I missing anything?

"40"
Raise Hope For Congo

"Love You Down"
Devil's Halo

"Water"
Soul Men

"Compared To What"
Talk To Me

"Imagine"
Instant Karma

"Fantasy"
Interpretations: Celebrating The Music Of Earth, Wind & Fire

"The National Anthem"
Exit Music: Songs With Radio Heads

"Two Doors Down"
Just Because I'm A Woman: Celebrating The Songs Of Dolly Parton

"Gentleman"
Red Hot + Riot: Music & Spirit Of Fela Kuti

"You've Really Got A Hold On Me"
"Cloud 9"
Standing In The Shadows Of Motown

"Better By The Pound"
Cookie

"May This Be Love"
Bitter

"Poison Ivy"
Batman & Robin

"Who Is He And What Is He To You"
Peace Beyond Passion

"Time Has Come Today"
White Man's Burden

Just FYI, Matthew keeps a running list of her released material here: http://www.freemyheart.com/discography.html. Not sure if covers are called out specifically, though.