Some french colours (studio white, Cremepuff, beau, romantique, moonlight & roses etc, you dont need all if these, just depending on the kind of french you would like to achieve)
Then I would say a classic red like either wildfire, masquerade or decadence.
A pink or two , my most popular are Tutti frutti and cake pop
Then some other popular colors are: Fedora, Tropix, Nude Knickers, Midnight Swim, Rock Royalty, Blackpool, Blue Rapture and Iced coral which is very good for layering. Hope this helps!