what singers have been unmasked this season?
['Lil Wayne. Photo : Fox. ... ', 'Drew Carey. Photo : Fox. ... ', 'Chaka Khan. Photo : Fox. ... ', 'Tony Hawk. Photo : Fox. ... ', 'Dionne Warwick. Photo : Fox. ... ', 'Tom Bergeron. Photo : Fox. ... ', 'Sarah Palin. Photo : Fox. ... ', 'Bella Thorne. Photo : Fox.']