Conversation so far:
What is The Odd Couple?
the duo's second album.
When was it released?
In early March 2008.
What songs were singles?
Who's Gonna Save My Soul.
What else is interesting about this album?
featuring four versions of the song which originally appeared on The Odd Couple.

Question: Versions of what song?
Self-contained rewrite: The Odd Couple by Gnarls Barkley what 4 Versions of what song?