Robert White's somewhat anonymous intro to the Temptations' "My Girl."
Good call. Billy Gibbons is criminally underrated, IMO.
I meant to say Can't You Hear Me Knocking.
Hard for me to say, so many. At the moment, Long Cool Woman (Hollies).
Slightly left field this but what about the 'third man' played by Anton Karas. Once inside your head it'll be the for a few hours at least. Just catchy.
Money for Nothing - Dire Straits
For some reason Chuck Berry-style riffs always sound cooler when played by Billy Zoom.