I think it's "Do you remember me?" or something like that?
i haven't seen Drop Dead Diva yet (i saw the previews though, i meant to DVR it but with this "pregnancy brain" i forgot
), but i read the Sophia Kinsella book you are thinking about, "Remember Me". in that book, the plot is the reverse in terms of body type..the main character wakes up suddenly and has a very thin and toned body, a millionaire husband, great job, dream closet, etc (in the beginning of the book she had a crappy job, didn't have money, was always struggling to lose weight, etc).
anyway, i hope Lifetime re-airs it, i really want to see it. i didn't know Margaret Cho was in it. I love her, i think she is hilarious.
edit: yay, i guess they are showing it again on Wednesday morning. i will set my tivo!