Fizzie Balloons are little Fizzie mascots that are usually floating in a high spot. They are pretty easy to get usually, but sometimes require a bit of skill bouncing and grinding and air dashing to get to them. You simply need to touch them with your body to obtain them.
Now, the game does a pretty good job of providing you with collectibles maps. They are easily purchasable with Overcharge, but I like saving my charge for better weapons. So I went and searched online for an awesome map of all the Fizzie Balloons.
Here is a link to the map:
which is from the website:http://segmentnext.com/2014/10/29/sunset-overdrive-fizzie-ba...
But if you still want an in game map for convenience, and don't mind wasting overcharge / have too much of it, you can go to Two Hat Jack, found in any hide out and other locations in the city.
To purchase your own maps, all you have to do is hold
on Two Hat Jack, hit
, and scroll through the list of maps for each and every collectible.
Below is a video showing you the pricing of all the collectible maps and every single one that is available for purchase.