Lindsay Lohan -- Oops, My Boob Fell Out AGAIN

"For the 2nd time (top picture) in less than a week ... Lindsay Lohan's right breast escaped its holster and hung out in Miami.Once Lohan got a hold of the situation, she flashed another piece of her anatomy to photographers ... her middle finger.

Lohan had a bigtime photo shoot on the roof of a Miami hotel this weekend -- and in between shots, LiLo had a Janet Jackson moment." (bottom picture) (TMZ)