Who Is on the Masked Singer?
The Masked Singer: A Guide to Which Celebrities Have Been Revealed, and Who's Still Left
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The Hippo's first few clues include: saying he's a competitor, and that breakfast is the most important meal of the day for him; he's "used to performing in a mask in front of thousands of screaming fans," suggesting a sport of some kind; he also says that every time he wins, he's just "gotta dance."