unless you live under a rock or somewhere else totally off the grid and haven't watched commercial TV w/in the last yr or 2. his song 'Levels' has been all over the place. as has Flo Rida's 'Good Feeling' which samples it. of course, the Avicii sampled an Etta James record you surely know.

http://www.youtube.com/watch?v=_ovdm2yX4MA (ffwd to 1:24 for the part you should already know)