Celebrity Big Brother winner Chantelle Houghton is slamming the new show format, despite being “obsessed” with its revival. She took home the crown in 2006, and has a few suggestions to make. After 18 years, Celebrity Big Brother is finally hitting our screens again. Chantelle was the infamous winner the last time it was on TV, when she convinced the actual celebrities she was famous – and it was iconic. Chantelle Houghton slams Big Brother formatChantelle is slamming the new Big Brother format, including the after-show approach of interviewing celebrity guests rather than the evicted housegue…