The quote is from the movie Coming to America which is easily Eddie Murphy's cinematic tour-de-force. Sweetpea is doing the following quote from Arsenio Hall's character "the Reverend" during the beauty pageant scene:
"Girl...you look so good...Someone oughta...slap you on a plate...and sop you up with a biscuit!"
In searching for this video, I ran across several other cute ones that I'll post later on. Good thing that E doesn't know how to surf the Web yet, cuz she would *hate* me for posting this stuff.