Watch the Don't You Love Me?: Rhythm 2 online guitar lesson by Andy Aledort from Jam Night Vol. 3
As stated, it sounds great to harmonize the signature lick, which the approach taken here: the line is played a third higher, starting on the flatted seventh, G, and moving up to the major third, C#. Over the four chord, sliding sixths take the place of strummed chords, and this approach is also applied to the five chord towards the end of the progression.