What’s the music playing during the titles of The Big Hangover? Sounds like a French folk song.
The 2009 movie?
Are you thinking “Ride the Sky II” by Revolution Mother?
Never saw the movie BTW
ETA. Sorry I see you meant the song on the opening credits. My bad.
“Black Hell” by Danzig? Check YouTube maybe…
Andreas Bergmann? Which version are you referring to?
Here is the one from 1950, before I was born. (Full movie from MGM library but dialog over-dubbed).
Hopefully it could steer you or others to the right direction.
Can’t watch it tonight, my attention span is too short. 
I assume you watched the 2009 release possibly?
(You kept me up way past my bed-time on this). 
Maybe “It’s Now or Never” by El Vez?
No, the 1950 film. I didn’t know about another one.
‘Sorry, this video is no longer available.’