Look at this unbelievable interchange (below), starting with The Donald's initial tweet:
"This was the ping pong ball after me slamming it on Nick Jonas lol haha"
We all remember Selena was NOT happy the last time these two hung out so we're thinking this ping pong friendship is just a way to get back at Selena after she wouldn't take him back for the trillionth time!
This childish behavior probably isn't the best way to get on her good side, Bieby!!!
[Image via WENN.]