Fun, playful logo for a photo collage app

Heartsie.me

We are a website that makes heart shaped photo collages. Ones that kind of look like this:

https://www.google.com/search?q=hea…0&bih=1272

I am looking for a modern, clean design that focuses more towards a female audience in the 18-30 range.

This is the temp logo I made, but it is too "young" looking and immature.
https://www.dropbox.com/s/ku07h5u2q…ologin.jpg

I like the squares in the logo, but maybe there are too many? It might be hard to read if the logo was small.

Here are some sophisticated website designs I like. These could be good inspiration for the type of modern style.
http://printstagr.am/
https://www.squarespace.com/
http://www.montagebook.com/
http://adventure.com/
http://locomotive.ca/en/
https://postmates.com/

You don't have to follow these designs exactly or anything. I just think they are nice and clean and modern. One thing I think these sites don't have is a bright colorful look. My logo is geared towards women and it is a photography product so I want to make sure it is light and bright and happy.

Words to describe the logo:
Light, bright, women, colorful, happy, simple, clean, elegant.

Please ask if you have any questions!