I'm sure we used Starline tours for the tour of the stars homes, it took around 2 hours and he took us up to see the Hollywood sign before driving down Rodeo Drive and through Beverly Hills and Bel Air. He showed us Hugh Heffners place, The Osbournes, Leonardo De Caprios and lots of others as well. It was very good and our driver was very nice. The only downside was being on a little bus and a lot of the time you could only see a hedge or a fence.
Love Ella