Showtime

It's Showtime! But which show?


 * Showtime (TV network), the US cable TV channel
 * Showtime (film), the 2002 film starring Robert De Niro and Eddie Murphy
 * over a dozen albums, one each by Doris Day, Show Luo, Angel & Khriz, Bro'Sis, Hurricane Chris, James Brown, Ry Cooder, Dizzee Rascal, The J. Geils Band, Avril Lavigne, Nitzer Ebb, Mick Ronson, or TV-2
 * Showtime All-Star Wrestling, an American Professional Wrestling promotion
 * The sixth expansion pack for The Sims 3

You may also be thinking of the trope and Stock Phrase "It's Showtime!"

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