LeAnn, 30, wore giant hoop earrings, black jeans, a backless black top and red heels, with her hair styled akin to Olivia Newton-John's character from the 1978 musical classic.
"Look at me I'm Sandradee," the How Do I Live singer tweeted.
Eddie, 39, wore an all-black get-up with his hair in a pompadour that would make John Travolta proud; his sons Mason and Jake dressed up as a Navy Seal and Indiana Jones, respectively.
As we exclusively reported Wednesday, the singer, who was in rehab earlier this fall, is exploring the option of adding more Twitter users as defendants in her lawsuit against a high school teacher and her daughter.
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