Article continues below advertisementKelly Osbourne is trying to stay strong after dad Ozzy Osbourne's sudden death on July 22.The fashionista did her best to keep her composure while attending a public funeral tribute on Wednesday, July 30, and a smaller, more intimate ceremony one day later.Article continues below advertisementKelly Osbourne's Promise to Dad OzzySource: megaKelly Osbourne allegedly promised her father she 'would not crumble in public' after his death.