Olivia Palermo Reveals Her #1 Fashion Faux Pas

As much as we follow and adore all the world's most fashion-forward ladies, there's one who seems incapable of a misstep. Olivia Palermo, who turned 29 this weekend, is essentially infallible.

Glamour celebrated the style star's birthday by taking a look back at her top fashion tips, which she initially revealed to U.K. fashion site lookThere are some real gems in here (read: all of them), so we had to share. Of particular note: Palermo discloses the number one, biggest fashion faux pas.

Keep scrolling to find out what she thinks is a major style mistake, plus more of her top tips ever!