Odd Referrals from DoubleClick in WP Stats When I Don't Buy Adwords

I have a question for all of you, in my WordPress stats over the past couple of days I am still a ton of referrals to my video site like this one:
https://googleads.g.doubleclick.net/pagead/ads?output=html&h=250&slotname=9261030203&w=300&lmt=962460000&flash=10.0.42&url=http%3A%2F%2Flearningdslrvideo.com%2Fluke-neumann%2F&dt=1308210438813&shv=r20110608&jsv=r20110607&saldr=1&prev_slotnames=6266139406&correlator=1308210438697&frm=4&adk=3999456218&ga_vid=1672899833.1306116542&ga_sid=1308209913&ga_hid=878256257&ga_fc=1&ga_wpids=UA-254134-20&u_tz=-420&u_his=36&u_java=1&u_h=800&u_w=1280&u_ah=721&u_aw=1280&u_cd=24&u_nplug=13&u_nmime=138&dff=lucida+grande&dfs=12&biw=1271&bih=625&eid=33895299&fu=0&ifi=2&dtd=36&xpc=d9YWUbgKUe&p=http%3A%2F%2Flearningdslrvideo.com

I don’t buy adwords so this is not coming from me, any idea where these visitors are coming from? If someone is buying me ads I would like to thank them!

Dave