Conversation so far:
What happened regarding the artist Feist?
On September 5, 2007 Feist released her hit song 1234.
Who was with Feist when she released the song 1234?
The song was co-written by Feist and Sally Seltmann, an Australian singer-songwriter who also recorded under the stage name New Buffalo.
What did the song 1234 do for Feist?
The single's success made Feist famous globally and boosted sales of her other releases.

Question: Who did this feature
Self-contained rewrite: Who did the song 1234 feature?