Federal prosecutors have asked a judge to give singer R. Kelly an additional 25 years in prison for his conviction in Chicago last year on child pornography and enticement charges, The Associated Press reported.

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Kelly, 56, whose real name is Robert Sylvester Kelly, is now serving a 30-year sentence in New York. If the judge grants the request, Kelly would not be eligible to be released from prison until he is around 100 years old.

Kelly was convicted in Chicago on three counts each of producing child pornography and enticement of minors for sex.

He was acquitted of obstruction of justice, one count of production of child pornography and three counts of receiving child pornography.

The additional 25 years would be served after Kelly finishes serving the 30 years in New York.

Kelly’s lawyer, Jennifer Bonjean, wrote in a filing last week that even with his existing 30-year New York sentence, “Kelly would have to defy all statistical odds to make it out of prison alive,” The Chicago Tribune reported.

She cited data that the average life expectancy of inmates is 64.

Kelly is set to be sentenced Thursday.