For the most part, the Jason Derulo song is his actual release... Not quite a remix, more a sample, much like Kid Cudi using Lady Gaga's 'Pokerface' in his song. Sounds like the 'JProx' part was just some kid adding his 'rhyme' to the song.
Some of my faves are:
And basically anything from here...
http://www.youtube.com/view_play_lis...=dj+hero+songs