Carrie Underwood is ditching her last remaining tie to "American Idol" -- the modest crib she bought in Tennessee to celebrate winning the crown in 2005.
Now that Carrie's a bonafide country music multi-millionaire ... she just sold off the 2,956-square-foot home in Franklin, TN (Google it ... tons of celebs live there) for $372,500.
The country superstar bought the 3-bedroom, 3.5-bath house for $384k ... ya know BEFORE she sold over 15 million albums and married a pro hockey star.
The house is pretty great -- for a non-famous person -- hardwood floors, spacious kitchen, garage, fireplace ... all that normal house stuff.
Carrie's far from homeless -- she and husband Mike Fisher dropped $3.2 million on 400 acres of land in nearby Nashville back in 2011 to build their dream home.
'Cause they're moving on up ...
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