To date, nine seasons have been broadcast, as summarized below.
Contestant in (or mentor of) "Boys" category Contestant in (or mentor of) "Girls" category Contestant in (or mentor of) "Wildcards" category Contestant in (or mentor of) "Young Adults" category Contestant in (or mentor of) "Over 25s" or "Over 30s" category Contestant in (or mentor of) "Groups" category Contestant in (or mentor of) "Covers" or "Teams" category