Flo Rida The BOOZY Toast Before DUI

6/9/2011 8:00 AM PDT
Right before Flo Rida was busted for DUI this morning ... the rapper was at a birthday party at a Miami nightclub, participating in a toast with a full glass. 

Flo was hanging at Dream nightclub until the wee hours of the morning ... before getting behind the wheel of his super-expensive Bugatti.

As TMZ reported, Flo was busted for DUI around 3:30 AM when cops say his blood alcohol level was more than twice the legal limit.