Covers:

1960:

Junior Wells [also for Chief, with Earl Hooker on guitar, copying the main riff of the recent Everly Brothers hit Lucille]

1961:

Muddy Waters [as Messin With The Man]

1966:

Junior Wells & Buddy Guy

1968:

Steppenwolf [as Tighten Up Your Wig; the live version from '70 has the line: "We stole this riff from Junior Wells, who stole it from someone else"]

1971:

Downchild Blues Band

1972:

Rory Gallagher

1977:

Eddie C. Campbell [as Santa's Messin' With The Kid]

1978:

Johnny Winter

1978:

Blues Brothers [We stole this riff from Junior Wells who stole it from someone else (Jake Blues); not only did they steal the riff, also this announcement (see behind Steppenwolf's cover)]

1983:

Luther Allison

1984:

John Mayall

1984:

Wilko Johnson

1999:

Lew Lewis

2013:

Buddy Guy [with Kid Rock]

2014:

Bill Frisell