Born Paul Velasquez, DRG became a hit last January after a three-minute clip of a double-rainbow outside his campsite went viral, attracting almost 3.5 million views and spawning similar posts, including Yosemitebear Mountain Wildlife Fall 2009 and the Double Rainbow Song.

FORBES: Double Rainbow Guy v. Henry David Thoreau

Dorothy sings a sublime song, "Over the Rainbow, " then loses her precious Toto, then recovers him.

WSJ: Nowhere Near the Rainbow

In one music therapy room, Kate heard 10-year-old Bethany Woods' rendition of Rainbow Connection, a well-known children's song from The Muppet Movie.

BBC: UK

The four-hour event ended with everyone holding hands and singing a song with the lyrics "You have to go through a thunderstorm to see a rainbow"--a reference to the dot-com bust and the dark days of the SARS virus scare as Taobao launched in mid-2003.

FORBES: OutFront