Blues song on the Cosby show?!

Blues song on the Cosby show?

I would like get the name of a blues song I heard on The Cosby Show rerun tonight. The family had a friend over they called Something Jackson, but in the credits they gave credit to BB King for being on the show, so I don't know if the song was sung by Something Jackson or by B B King.

THe part of the words I caught waent something like:
I bought you a car but you wanted a cadillac.
I bought you (some kind of) food, you said thanks for the snack. I gave you seven children and you wanted to send them back"
'
Anyone out there have any ideas what the name of the song is and who does it?

Try "How blue can you get" by "BB King"

Been downhearted baby
ever since the day we met
I've been downhearted baby
ever since the day we met
Our love is nothin' but the blues
Baby how blue can you get

My love is like a fire
Your love is like a cigarette
My love is like a fire
But baby yours is like a cigarette
I watch you step down on it baby and crush it
Tell me how, tell me how, how blue can you get

You're evil when I'm with you
and you're jealous when we're apart
Yes you're evil when I'm with you baby
Lord have mercy, you're jealous when we're apart
How blue can you get
Hey that's a writing in my heart

I gave you a brand new Ford
and you just said I want a Cadillac
I bought you a ten dollar dinner
You said Thanks for the snack
I let you live in my penthouse
You said it was just a shack
I gave you seven children
and now you wanna give 'em back

I've been downhearted baby
ever since the day we met
Our love is nothin' but the blues
Baby how blue can you get