“Big Brother” season 18 and 19 star Paul Abrahamian chats with ET Canada in studio about Julie Chen continuing her hosting duties on the reality competition show. Plus, although he may not be entering the “Big Brother” house again anytime soon, Abrahamian shares new details about his latest project: music with his band Van Alden. “Celebrity Big Brother” debuts on Monday, Jan. 21 at 8 p.m. ET/PT on Global.