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When did the band, Powderfinger go on tour for their song, My Happiness?
Where did the band, Powderfinger go touring for their song, My Happiness?
Powderfinger performed My Happiness live on the Late Show with David Letterman while touring North America with British rock group Coldplay.

Question: How did they promote themselves?
Self-contained rewrite: How did the band, Powderfinger promote themselves for their song, My Happiness?