Lindsay Lohan is headed for a showdown with one of her most outspoken critics -- Dr. Drew Pinsky -- and it's all going down at a Weenie Roast.
TMZ has learned Lohan has snagged tickets for the KROQ Weenie Roast concert this weekend in Irvine, CA -- and Dr. Drew is also on the VIP list.
Of course, Lindsay ripped the good Doc recently -- after he stated that if LiLo was his daughter, he would plant drugs on her and make sure she got arrested ... to ensure she would get treatment. The two have yet to kiss and make up.
The concert is set to go down this afternoon -- we'll keep you posted.