'Cherry Pie' Singer Gets 120 Days in Jail for DUI

TMZ has learned former Warrant singer Jani Lane just plead no contest to DUI stemming from his most recent arrest back in May -- and has been ordered to serve 120 days in jail.

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As we first reported, the '80s rocker -- who was also busted for DUI in 2009 -- was arrested in Woodland Hills, CA on May 9 after crashing into a parked car ... and then blowing twice the legal limit during a breathalyzer test.

Besides the jail time -- Lane will lose his license for three years and will have to complete a 30-month alcohol education program.

We're told Jani is scheduled to surrender on July 27.