I wasn't aware of these until very recently so thought I'd share them for others who didn't know about them.
On Fire (sample appears at very beginning): http://www.youtube.com/watch?v=25xgajbP ... r_embedded
You're Never Over (sample appears at 1:10): http://www.youtube.com/watch?v=7fFo-WZs ... r_embedded
Untitled (sample appears from beginning): http://www.youtube.com/watch?v=uWCMhL5q ... _embedded#!
and finally
Cold Wind Blows (1st sample appears at the beginning, and then at 3:30 the sample used in the introduction appears): http://www.youtube.com/watch?v=GbtHUoC6 ... r_embedded
The Cold Wind Blows one was most surprising to me, especially the fact that the song's intro appears in there as well at 3:30.









