I found this and thought their skillz were pretty great. The lead singer doesn't have the grit and grind that Hetfield has, of course, but I'm still very impressed. Three young girls cover Meeetallica's "Enter the Sandman," and the bassist is only 9.
http://www.sliptalk.com/little-girls-cover-metallica/?utm_source=soed&ts_pid=2&ts_pid=5
My favorite black metal band ever...
Cool video!