i think one of Alexandra Burke/Leona Lewis
one of Shayne Ward/Leon Jackson/Matt Cardle
if a musicals genre act a Giovanni Spano or Rhydian Roberts then
maybe now bc one direction split, one of those as a solo act for boys category
as for groups, i can see a super group formation coming, maybe one all men, one all women, and one mixed
as for novelty/fun acts Wagner or Johnny Robinson among overs acts and maybe Reggie N Bollie at groups as for a fun act in that category
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Taking part in Strictly Jake's Tibb does Strictly Game.