Lindsay Lohan turned an ordinary sidewalk into a wild scene in front of Harmony Lane yesterday afternoon -- where tourists became paparazzi for a shot of the fab rehabbed starlet.

TMZ was at the Beverly Drive store while Lindsay shopped, when one family of tourists-turned-photogs tried to get a few pictures. The mom of the group can be heard continually asking one of her kids if they got the shot yet, but sadly, the kid wasn't as skilled with the camera as the 20-something professionals surrounding him -- and missed the money shot when LiLo walked up to the front window!

Next time, try a camera with autofocus!