Conversation so far:
How does 21-Adele relate to Wilson?
Wilson co-wrote three of the songs on Adele's multiple-Grammy-winning 21.
How did they come to work together?
CANNOTANSWER.
Did they continue to work together after working on this together?
CANNOTANSWER.
Are there any other interesting aspects about this article?
"  "Someone Like You" won the 2012 Grammy for Best Pop Solo Performance.
Did he receive any other awards related to this?
was voted third most favourite single of the last 60 years in the UK.

Question: Is 21 a single or an album?
Self-contained rewrite: Is Adele's 21 a single or an album?