Usher "Mayday"

Here's a track from the Royal Court/Timbaland sessions from a few years ago called "Mayday." Check it out:



Not my favorite track and I can see (and hear) why it was left off the album. Hwoever, there definitely are a few repeat Timbaland sounds in this track we've heard before, can you name them?

Yes of course the obvious is from TLC's "Dirty Dirty""


but what about the others?