is filming in Rome, Italy, and Bieber joins a long list of celebrities getting in on the film's fun.
Both an unrecognizable Kristen Wiig
and super sexy Penelope Cruz have been spotted
in character, while Owen Wilson, Christine Taylor and Will Ferrell are confirmed to reprise their hilarious roles. In addition, Fred Armisen, Billy Zane and Olivia Munn have signed on, and, according to IMDB
, Kim Kardashian and Kanye West are also on board.