‘The Masked Singer’ Season 11 Premiere Opens With a Superstar Reveal: Here’s Who Was Under the ‘Book’ Costume

variety.com:

Michael Schneider Variety Editor at Large SPOILER ALERT: Do not read ahead if you have not watched the Season 11 season premiere of “The Masked Singer,” which aired March 6 on Fox. “The Masked Singer” kicked off its 11th season on Wednesday night — and in perhaps the show’s most unusual reveal ever, comedian Kevin Hart brought his prank war with host Nick Cannon to the show.

Hart brought his one-night-only appearance to “The Masked Singer” as Book, singing the song “So Sick,” by Ne-Yo (who happened to be the Season 10 winner on the show).

The performance… was a bit pitchy, dawg. At the end of the song, the show’s panelists seemed to dig it. But after Robin Thicke quickly I.D.’ed Hart, the star took off his costume to reveal himself. “This is a prank, you had no idea I was coming here Nick, and guess what, there’s nothing you can do about it,” Hart exclaimed to Cannon — who supposedly was not told about the appearance before hand.

Hart and Cannon have a long history of pranking each other, and have even turned that into the series “Celebrity Prank Wars.” “This is stupid!” Cannon exclaimed. “That was the worst performance ever on the history of this show!” Hart claimed his off-key rendition of “So Sick” was on purpose, but Cannon wasn’t having it: “You embarrassed yourself!