The Top 26 celebrate in Hollywood on American Idol Season 21 Episode 10.

It’s official: The Top 24 artists on American Idol Season 21 have been confirmed. Well, actually, it’s the Top 26 — in a surprise twist, the judges decided to send Matt Wilson and Colin Stough as two additional contestants in the next round. Many fans were thrilled by the news, but they also noticed something a bit confusing: Only 25 artists were shown on TV during the Showstoppers/Final Judgments. Either American Idol had its math wrong, or a mystery contestant has taken the final spot in the Top 26. Luckily, fans think they’ve figured out who it was — and they think that person dropped out.

[Spoiler alert: The following story contains spoilers for American Idol Season 21’s Top 26.]

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