Just received the platinum trophy for this game several hours ago at the time of writing. I was so pleased to finally have seen this game through to the absolute finish, it's a great racing game and has lots of stuff from my hometown of Los Angeles.
Of particular concern was a certain trophy that required I join a multiplayer game with five of my friends. However, the developers of the game failed to take into consideration that the PSN friends list had been expanded from 50 to 100 friends, and failed to patch the game accordingly. I had to temporarily delete about 30 friends to meet the quota, and plan for days a game session with 5 other souls to get that dern thing. Luckily, I finally got it, however none of my boosting partners received one due to that very bug.
So without further ado, I wish to thank those people that helped me to get that darn trophy while simultaneously sacrificing their chance due to the blasted glitch, and eventually to let me platinum this game, because without them I'd be stuck spinning my wheels.
To the five of you, I hereby dedicate this platinum.
Unlock the Platinum trophy by unlocking all other trophies.