Hey! Searching for news, I've found some Usher demos, which were supposedly produced by Max and Luke. I do not know if it is true, because I have not found any sources confirming whether they've worked with Usher or not, but I've found an article where it says Dr. Luke and Usher are working with rapper Nelly .
http://www.sohh.com/2010/05/nelly_recruits_usher_jamie_foxx_more_for.html
So, it is possible these demos are true and that Max and Luke have worked with Usher. Anyway, demos can be found here:
http://www.rnb4u.in/1019_22-Usher-DEMO-DJ-Got-Us-Falling-In-Love-Prod--By-Max-Martin.html
The intro of the song above is really similar to some Whataya want from me melodies speeded up.
I think it's fake
who knows, maybe it's true. It's a really good song, I love it regardless.