Mackenzie Phillips, who has long battled substance abuse problems, was arrested at LAX yesterday for alleged possession of heroin and cocaine.  At 10:00 AM, officers responded to Terminal 4, where 48-year-old Phillips was being screened by TSA. During the screening process, some baggies and balloons believed to contain heroin and cocaine were recovered.

Mackenzie's half-sister Bijou Phillips tried to bail her out later that night but Mackenzie refused her money, saying that she'd rather just stay in the cell. Sad.

Let's take a look at Mackenzie in happier times.  Check her out at a fan convention in May.  Mackenzie is best known for her role of Julie on 70s classic One Day at a Time.