The actress, according to reports, was clad in a pink mini-dress at the event, surrounded by an intimate group of friends, and didn't drink.
"There was a ton of alcohol at Lindsay's table," an onlooker told Us magazine of the embattled star, "however she didn't appear to be drinking."
The Mean Girls star tweeted thanks to the musical group Speakers "for coming out and killing it on my birthday!
"These guys are awesome," Lindsay wrote.
Another report from x17 claimed the Liz & Dick beauty "was super happy to be the focus of all that attention all night long."
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