Kelly Osbourne: "I Cracked My Head Open"

Kelly Osbourne is Tweeting about an injury she suffered in Miami over the weekend.

The 27-year-old was partying at Liv nightclub in Miami on Saturday, but apparently things went awry!

She Tweeted on Sunday:

"I just want 2 thank all the incredible doctors and nurses @ Mercy hospital in Miami 4 taking such good care of me u guys really are amazing! ... Long story short I cracked my head open then kept passing out I have the all clear my mum came 2 get me ... "

She was in the Miami heat to cast models for her Material Girl clothing line with Madonna's daughter, Lourdes Leon.