The "A" is custom.
The "C" and "R" are slanted and extended Bank Gothic.
Ok, that's really to small to identify.
But maybe this will work for you:
If not just type "typewriter" in the searchbox here on dafont. I'm sure you find something you'll like.
Edited on Mar 15, 2016 at 17:36 by frd
Most likely not a font. Maybe Ms Stefani has written this herself

Looks handdrawn.
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