By Seamus Duff The Celebrity Big Brother house erupted in cheers as well as tears as Marisha Wallace received some huge personal news. While in the infamous house, contestants are supposed to be completely cut off from the outside world. This week, 38-year-old American actress Marisha was nominated for an Olivier Award for her recent work in West End smash Guys & Dolls and she’s included in the Best Actress in a Musical category. By the strict rules of the Big Brother house, Marisha should have been kept in the dark about the nomination – but during an afternoon of fairground events, Marisha l…