Sammy Hagar & The Circle are back with Lockdown Session No. 7, “Keep A-Knockin.” Sammy added “I had the hardest time with this one because every time I came in singing, I started singing Led Zeppelin “Rock ‘n’ Roll”! It took me three damn takes. My favorite drummer and my favorite singer of all time – love this one hope you do too. Long live the music of John Bonham and Little Richard!” Check it out above.