Need Help Identifying Tree, small white flowers

Can anyone tell me what kind of tree this is?

 

It sue looks like Lilac blooms,So It may be a lilac.

 

It sure if pretty but it doesn't look like my lilac. Where's Droopy, she'll know.

 

I'm here. I've no idea what that bush is.

 

all I know is that doesn't look like a lilac...

 

I've never seen a box elder bloom, but those leaves look very box elder-ish.

 

Thanks, guys! I'm sure someone will come along that will be able to identify this mystery tree/bush....haha!

 

New growth on Box-elders are green. I don't see any green limbs. What does the wood smell like?