I did it.
I decided I am going to actually aim for the forest backgrounds 2 lily of the valleys and the green crystal instead of Mom's plush.
Too good to not go for.
As a result, I picked up a ton of background collectibles, my balloon dog, patch, and cakes (yumo!). And...
Dun dun dun!
3 mystery gradient heart balloons!!
I meant to pick up a red heart balloon first before the mystery gradient hearts, but messed up. A hope of mine was to potentially get a sky background, red heart, black heart, red heart, sky background pattern to go above the brown background, cake, patch, cake, brown background. But I may not have gotten a black balloon in these three anyway.
I look forward to seeing what my balloons will turn into!!