Conversation so far:
What songs did he produce with Cheiron and Denniz PoP?
Wish You Were Here.
What artist sung Wish You Were Here?
Rednex song.
Is there any interesting facts about Max Martin working with Cheiron and Denniz PoP?
the Cheiron Studios was hired by Zomba to work on Backstreet Boys' self-titled debut album Backstreet Boys (1996).

Question: What other groups did Max Martin work with?
Self-contained rewrite: What other groups did Max Martin work with aside from Cheiron and Denniz PoP?