Conversation so far:
What happened to Hanson in 1997?
Hanson are best known for the 1997 hit song MMMBop from their debut album released through Mercury/Polygram Records, entitled Middle of Nowhere, which earned three Grammy nominations.
Are there any other interesting aspects about this article?
Hanson has sold over 16 million records worldwide and have had three Top 20 albums in the US.
What happened on Hanson Day?
Middle of Nowhere was released in the US on May 6, 1997, selling 10 million copies worldwide. May 6 was declared 'Hanson Day' by Oklahoma's then-governor Frank Keating.

Question: what was his greatest achievement?
Self-contained rewrite: What was Taylor Hanson's greatest achievement?