Celebs and luxury brands

So, I was going through an article on the net about celebs spotted with luxury handbags. DP had a Fendi Roma bag, Anushka Sharma had a Dior limited edition bag and Alia had a weird two strap bag I forgot the name of. But it got me thinking which brands do the celebs favour? Does anybody here know like which celebs use which brands the most? Kareena has a Birkin I think, also saw somewhere Tamannah has Chanel. 

Also, nowadays these brands are easily available but what about yesteryear actresses? They must have got all imported stuff back then but like what brands?