Thankfully, this party never really caught fire.
Mischa Barton was just one of the celebs spotted lighting up a cigarette at Alexander Wang's Fashion Week soiree.
What's the big deal, you ask? The event was held at a Mobil gas station in NYC, and the celebs were directly next to the gas pumps.
Other celeb offenders at the hipster-chic bash included Jared Leto and Courtney Love, who also performed at the party to not-so-rave reviews.
"Her rendition of 'Bette Davis Eyes' (belted out with the help of cue cards) was painfully off-key," a source tells E! News, adding that the crowd still seemed into it.
Luckily, the party eventually fizzled out on its own.
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Did you catch Mischa on The View? Check out what she says brought on her recent hospitalization.