I was just messing around one day and figured this one out, but ill be damned if it
doesn't sound just like the original

all strings tuned down a half-step: Eb-Ab-Db-Gb-Bb-Eb


Eb:-----------3--------------/------------3-------------/
Bb:-----1---------1-------1--/-----1----------1-------1-/
Gb:--------2----------2------/--------2-----------2-----/
Db:--0-----------------------/--0-----------------------/
Ab:--------------------------/--------------------------/
Eb:--------------------------/--------------------------/

just keep repeating that

a madonna song, god i need to get a life, at least i came up with it all by myself