We never saw it coming: Jennifer Aniston having a bad hair day. But it has, and she’s just opened up to Elleuk.com about it.

But not all Brazilian blow-outs are made equal, as 44-year-old Aniston recently found out. When asked by Elle if she’d ever change her signature style, the American actress replied, “funny you say that. I actually just cut all my hair off two days ago.” The reason? A Brazilian blow out: “my hair did not react really well to it,” admitted Aniston.

Freshly cut last Wednesday, the Jen bob is two inches above her shoulders, and has yet to be revealed as she’s hiding behind closed doors, no doubt with a large supply of her own-brand of haircare, Living Proof, to repair the damage done. Although the star revealed, “the minute I cut my hair I want it back. Always. It’s a guarantee. I’m trying really hard to love this one,” she said.

So the moral of the story is that Brazilian blow-dries are great for our hair. While some improve your hair, some can dehydrate, damage and ruin it. Too bad Jen didn’t speak to us first, so here we give her, and you, the lowdown on finding the best in Brazilians by our expert stylist Zoltan Vargyai, the beauty editor go-to for straightening treatments.

2. What experience has the stylist had? “Always ask how long they have been performing the treatment, how many are they doing a week – and ask to look at pictures of their clients. Try and speak to a customer if you can. It sounds simple, but it’s imperative,” warns Vargyai. “This treatment isn’t a one fits all either, so make sure your stylist has talked to you about what your hair actually needs, as you might need a very light frizz fighting fix.”

3. Turn down the heat: Sometimes it’s not the chemicals used, but in fact the heat used from the straightening irons, and even hair dryer, during the treatment that causes damage to hair. So just be responsible and watch what’s going on back there,” says Vargyai.