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Sharon Osbourne calls Lady Gaga a 'bully' as feud escalates

Lady Gaga
In the newest round of score-settling, Sharon Osbourne has been using her Facebook page to dress down Lady Gaga for remarks that Lady Gaga made about Sharon's daughter Kelly. This followed an earlier bout of acrimony after Kelly in a magazine interview called Gaga's fans "the worst." The tiff... AFP / Getty