Leo and Bar It's OVER!!!!!

5/12/2011 5:30 AM PDT

Leo and Bar -- It's OVER!!!!!

Leo DiCaprio and Bar Refaeli have officially broken up once again -- which means the countdown has officially begun until Leo rebounds with an even hotter foreign supermodel ... or three. 

36-year-old Leo and the 25-year old Israeli beauty began dating in 2006.

They previously split in 2009 -- only to resume their relationship six months later.

Think the break is for good this time?