Why Does This Keep Happening To Toni Braxton..?

Toni Braxton -- who sold more than 40 million albums in her career -- just filed for Chapter 7 bankruptcy in California ... and in the docs, the singer claims she's only worth somewhere between $1 mil and $10 mil ... but she could have up to $50 mil in debts.
In the docs, 43-year-old Braxton lists a ton of creditors to whom she thinks she may owe ... including:

AT&T -- The Four Seasons Hotels
-- Cedars-Sinai Medical Center
-- Various medical bills
-- DirecTV
-- Neiman Marcus
-- The William Morris Agency
-- Tiffany & Co.
-- Orkin Pest Control
-- The Internal Revenue Service
-- BMW Financial Services

Braxton also claims she may owe money to the City of L.A. Parking Violations Bureau -- and the DMV in both California and Nevada.