Billy Bob Thornton Billy Bob Thornton

Did they have bad gravy?

Billy Bob Thornton's band, The Boxmasters, has nixed the final two shows on their Canadian tour with Willie Nelson because a band member and several members of the crew came down with the flu.

The cancellations come after The Boxmasters were booed and taunted at a Toronto show Thursday — a result of Thornton's comments during a CBC interview in which he likened Canadian fans to "mashed potatoes but no gravy."

Along with the booing at Thursday's show were cries of "Here comes the gravy," according to The Toronto Star.

The bug is nothing a trip across the border won't cure: The Boxmasters will rejoin the tour in Connecticut on April 14, they said on their website.