She posted a picture of her foot to Instagram last night with some kind of brace on it.
"I have to hang up my dancing shoes for a little bit because of a few stress fractures in my foot but it's not gonna stop me from singing for you guys on the #DWTSlivetour," she wrote.
Willis, 26, was crowned the winner last month on the latest season of "Dancing With the Stars" and later joined the show's Live Tour.
“That’s who this mirror ball is for, honestly,” she told the audience on "Good Morning America" the morning after her win. “It’s for everyone who ever felt like they weren’t good enough or felt like they couldn’t accomplish something, because you can."