We did drive through Malibu but we never stopped. Never saw any celeberties at all during the roadtrip. Nice cars though.
I have never seen so many Rolls-Royce in my whole life but in US they are all over the place. Only saw one single Maybach in "Santa Barbara".

Before I came to US I only seen two or three Aston Martin in my whole life but in the California they were all over the country. Seem to be very popular over there.

I have a funny video clip of a guy working out on the beach in Santa Monica. No offense to him but it looked ridicolous.

Ps We also did a quick stop in Beverly Hills.