I n the final week, the "Big Brother" contestants will be joined by one last celebrity guest. Daniela "Danni" Büchner (47) ...

According to Joyn's announcement, reality TV professionals such as Matthias Mangiapane (41), Serkan Yavuz (32), Dilara Kruse (33), Cosimo Citiolo (43), and Vanessa Nwattu are taking on the challenge.