Alice Du Pont - heat loving tropical vine that produces cute pink flowers.
Allium - Low growing pink flower.
Dianthus - A pink flower used alot as a fragrance!
If it is going to be cutesy and vibrant, I would use an Asian town name. I will give you some Portuguese words as suggestions!
- Beijinho (Bay-she-nyo) - "Little Kiss"
- Oliveira (Olee-verda) - Olive tree. (Not sure why you would name your town olive tree, but it's just a nice sounding word. )
- Amor-de-Rosa (Ah-more-deh-Rose-ah) - Pink Love