Kelly Osbourne breaks silence on father Ozzy Osbourne's death at 76 with emotional tribute

Kelly Osbourne broke her silence Thursday on her dad Ozzy Osbourne's death.

"I feel unhappy I am so sad," Kelly wrote in an Instagram story. "I lost the best friend I ever had."

Jack Osbourne's ex-wife, Lisa Stelly, also paid tribute on Instagram to the Black Sabbath singer, who died July 22. He was 76.

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Stelly, 38, shared a handful of heartwarming images of the late musician with his grandkids, and wrote, "The world got Ozzy.