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Britney may need a Plan B!

After a whopping 13.5 million viewers tuned in to Glee's Madonna-themed episode on April 20, Britney Spears' manager, Adam Leber, began a campaign for a special installment featuring tunes by the singer, 28, Twittering, "Do you guys want to see a Britney Spears episode of Glee?"

Apparently, not everybody does -- including the Fox series' star! Asked about the possibility on the red carpet at the White House Correspondents' Association Dinner in Washington, D.C., on May 1, Matthew Morrison, 31, told Us Weekly, "That's a rumor her manager started. I hope our show doesn't go along that route." Ouch!