My Sharona is the debut single by The Knack. It reached Number 1 on Billboard Hot 100 in 1979 and stayed there for 6 weeks.
The riff in the intro and the verse is alternating between the 6th and 4th string (G) and then ending on the chords C and Eb. Repeat once.
Then the first two bars of the riff alternating between the 6th and 4th string (G) is repeated and then building up with chord Bb.
At last the chords C, Eb and F.
The guitar solo in left as an exercise to the reader.
TAB: My Sharona