The ‘B’ side has also been popular –
It’s My Thing
On the original Soul scene we heard her but did not know her; as she was a member of The Esquires GET ON UP. And we certainly did get up to dance to that 45, but missed this double ‘A’ sided piece of vinyl until our Northern Soul pals found it in the 70’s.
Wikipedia: The Esquires
Also The Impalas did a version of SPEED UP, and that’s great too.