Big Brother VIP premieres.With a mixed bag of contestants - and mixed reviews over some of the cast choices – the show is sure to drum up controversy, drama and shock confessionals.WATCH: Omarosa says Caitlyn Jenner treated her terribly on Big BrotherUnlike the traditional Big Brother Australia format, the contestants won’t be fighting it out for prize-money for themselves – but will instead be aiming to win the $100,000 for their chosen charity.Sonia Kruger is back on hosting duties, revealing