New York, Oct 19 : Actress Lindsay Lohan seems to be working towards staying sober.

The guests at DJ Ruckus' birthday party were shocked to see `Mean Girls' star completely in control.

"She was totally in control all night," the New York Post quoted a witness as saying.

"She basically stayed in one place and hung out with a bunch of girlfriends," the witness added.

Meanwhile, Beverly Hills judge has extended her probation for a year after learning that she hadn''t completed the alcohol treatment program following her 2007 drunk driving arrest. (ANI)