MasterChef 'MasterChef' adding Christina Tosi as new judge, 'MasterChef Junior' renewed for fourth season 01/14/2015 MasterChef Junior is adding Christina Tosi as a new judge, replacing Joe Bastianich. Read More RELATED NEWS Michelle Obama challenges kids on 'MasterChef Junior''MasterChef Junior's fifth-season premiere date revealed by Fox 'MasterChef' adding Christina Tosi as new judge, 'MasterChef Junior' renewed for fourth season TAGS: MasterChef Joe Bastianich Graham Elliot Gordon Ramsay
