Lindsay Lohan stormed into London last week over a series of late nights out on the town that saw her stumbling out of clubs, scurrying into a sex shop-themed restaurant and throwing her usual tantrums in public.

And while her adventures have supposedly been entirely alcohol-free, she claims, they're still doing a number on her looks.

Breaking Celebrity News can reveal that she made an emergency call to hair extension expert and celebrity stylist Tatiana Karelina for some beauty 911 to make her ready for another night on the town.

Lohan is "partying hard," a rep for Karelina tells Breaking Celebrity News, "and needs to look her best at all times."

On January 16, Karelina made a special house call to Lindsay's rented flat in the Chelsea neighborhood of London "before another night of partying," the rep says, where she "styled her 22-inch extensions, curling the hair into loose waves, and trimming a slight layer to frame her face."

Lohan didn't opt for Karelina's ultra-luxe "Tatiana Hair Extensions," however. The rep reveals that Lohan uses "what they call seamless extensions, where a slice of her hair is inserted between two sticky wefts strips of tape," a sometimes-damaging method that Karelina does not recommend.