Joanna Gaines and Home Exterior

Joanna Gaines in Front of White Home Exterior

The first design mistake Joanna Gaines of HGTV's Fixer Upper ever made? "For our first high-end flip, I chose a tan stucco color," Joanna says. "After it was painted, I pulled up to the house and it looked like a big yellow school bus." Lesson learned? Always buy paint samples.