For most people ... a $1.1 million debt to the IRS is a REALLY BIG DEAL ... but when you're Lionel Richie and worth an estimated $200 mil ... it's probably just a nuisance.
According to documents obtained by TMZ ... Richie owes the federal government $1,130,609.11 in unpaid income tax for 2010.
The singer has been slapped with a lien ... which means Uncle Sam can start going after his stuff if he doesn't fork over the dough ASAP.
We called Lionel's rep for comment -- still waiting for a call back.
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