Wilde, 29, said concealer is one of the biggest red carpet beauty disasters, reported Contactmusic.
"Concealer is easy to get wrong. Everything seems normal in daylight, but under a camera flash it turns white and you look like a raccoon," she said.
The actress said she often tries to apply her make-up in the car for best result.
"I love that whole 60s thing, so the basics are good mascara and some flicky, liquid eyeliner - I've been known to do it in the car, but that never gives great results," she added.