New York: Lindsay Lohan apparently went crazy after learning her former lover Samantha Ronson had jetted to Nicole Richie``s bachelorette party in Cabo.
Richie is rumoured to be marrying rocker Joel Madden, the father of her two children.
According to kickster.com, Lohan "went crazy" trying to find out who was with Sam on the Mexican trip because she "couldn`t get permission to leave the country . . . and wasn`t invited," reports the New York Post.
Sources said that while Lohan and Ronson are not a couple any more, Lilo is still obsessive and "kept trying to track down Sam."
A rep for Lohan didn`t get back to us.