Looks like a flowering crabapple to me. They often have pink blooms that fade to white the more sun there is.

I doesn't fade to white. Literally, the upper portion of the tree is white blooms, and the bottom portion of the tree is pink blooms. Many of these trees are in my neighborhood and almost all are completely pink. There is one small one at the beginning of the neighborhood that is half and half also. There is no chance that it is two different trees.

It could either be a sport or some grafted branches at the top. This looks like what has become popular as street trees here - Prunus serrulata (Japanese Cherry). There are a bunch of cultivars ('Kwanzan' is what is mostly planted here). 'Mt. Fuji' looks like it has pink buds that open to white.

Here is a link that might be useful: Kwanzan Cherry

My guess would be kwanzan cherry also. Here's a close-up pic of the blooms.

Here is a link that might be useful: Kwanzan cherry

I had a flowering crabapple in front of my old house that dropped berries after it bloomed. It bloomed in April almost entirely white. That's exactly what the picture looks like to me.

That's really interesting - I think it's a flowering crabapple grafted onto a Kwanzan cherry. The white flowers look apple-like. Kwanzan cherry trees (I mean the ordinary, ungrafted kind) do not bear fruit. Do the "berries" occur on the upper part of the tree where the white flowers are now? Many ornamental crabapple varieties have been bred for very small fruit, the size of berries.

I posted this one the 'Name that Plant' forum. Please check it, it's very interesting what they've come up with!!

Let's post a link to the other thread and not leave everyone in suspense! This mystery has a "sweet" solution, not the one I suggested. May you can guess the answer from my clue before reading link.

Here is a link that might be useful: fruity white flowers above

Hehe, thanks!! I feel like I have a beautiful and special tree. Thanks for your help!! Christy