I'll dive in.
Yep, she's called Scarlett. After Johansson. This is due to the fact she is surprisingly athletic (in Avengers) and obviously fairly attractive.
The M3 was Olivia, after Olivia Wilde, sexy just sexy.
The Focus RS was Rihanna, she was feisty and a bit 'look at me' seemed to fit.
There are many others but everyone of them had a name. I tend to call them whomever is my 'current' fancy.