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).
What other groups did Max Martin work with?
Ace of Base's.
Did he produce any songs with Ace of Base?
second album, The Bridge (1995).
Did he ever retire from producing music for other bands?
CANNOTANSWER.

Question: What other interesting facts can you tell me about Max Martin?
Self-contained rewrite: What other interesting facts can you tell me about Max Martin aside from bands he's produced music for?