Madonna Headed for Das Big House?

If Madonna doesn't change her ways, she could be going from "Hung Up" to locked up.

German prosecutors have announced plans to monitor the erstwhile Material Girl's Sunday concert in Duesseldorf to see if she goes ahead with the mock-crucifixion routine that has been drawing religious ire since her Confessions tour kicked off in May.

Should the pop star, who turns 48 Wednesday, perform the shock shtick, Johannes Mocken, a spokesman for the local authorities, told the Associated Press it could be construed as insulting religious beliefs, an offense that's considered not only insensitive, but illegal in Germany.

If Madonna goes through with the Jesus-channeling act and the locals find it insulting, she could face a maximum sentence of three years in prison. Meaning, Madonna's next reinvention could be as an inmate.

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