That is the correct spelling of "rock" (stone, or a music genre).
Rockin is not an English word
Rockin' was created in 1972-02.
Miranda of course.....she is rockin awesome
Keep on Rockin' was created in 1969.
Butt Rockin' was created in 1981.
Rockin' at the Hops was created in 1960.
The Rockin' Berries was created in 1961.
Rockin' Dopsie died in 1993.
Rather Be Rockin' was created in 1979.
Rockin the Rocks was created in 2007.
I Hear You Rockin' was created in 1986.
Rockin' Radio was created in 1983.