I would recommend skipping the bus tour and just checking out Hollywood Blvd on foot, there is lots to see and great food. I have heard the tours just take you to properties the celebrity owns not necessarily where they actually live. I lived on Hollywood Blvd for a while and the bus used to stop at my little apartment building, no one famous lived there unless you count a tattoo girl from some TCL show I had never heard of. Celebrities live behind high hedges and gates. If you want to see celebrities go shopping at the grove or take the WB back lot tour, both will give you a better than average chance of seeing someone.