Glass, it would seem, is something that two of the biggest names in the Irish American celebrity world have in common.

While Magnus, an apprentice glass-blower, is flying high as she battles her way through to the final stages of ‘American Idol,” Lohan has become a glass-thrower, as some of the shenanigans she got up to over the weekend reveal.

According to the New York Post, Lohan let a glass (full of her drink, btw) fly at former lover Samantha Ronson at an LA nightclub on Friday night.

Lohan flung a glass at Ronson, who was sitting chatting with friends while taking a break from working as a DJ.

"Samantha was DJ-ing and went to sit with her friends when Lindsay stormed over and threw a glass at her head. Glass flew everywhere, and Samantha looked really shaken up. The club owner asked Lindsay to leave and was overheard saying she'll never come back,” a source told the Post.

Ronson later commented about the incident on Twitter.

"Just got a glass thrown at my head . . . Hmmm -- wonder who did it,” she tweeted.

Ronson was not hurt in the incident.

This comes after father Michael called the cops to make she was not a bad influence on younger sister Ali and mom Dina staunchly defended her daughter . . .