Sharon Osbourne and her ‘Celebrity Big Brother’ co-star Louis Walsh say they have stories so shocking on Simon Cowell he will “need more Botox”. The pair of former ‘X Factor’ judges, who are starring the ITV reality show, spent years working with music mogul Simon, 64, on the talent series, have teased they have jaw-dropping tales on him. Sharon, 71, who is getting paid a rumoured £500,000 for her appearance on the show, said: “There will be lots of stories – he’s going to need more Botox after we finish with him. “There are just so many things, conversations, something else will come to the f…