Go Blonde is an annual parade and event where thousands of Latvian Blondes (both natural and artificial) get together in Riga to raise money for charity. The event is organized by the Latvian Association of Blondes whose motto is "For Charity With Humor", so you can gather from this that the event is really just about having fun and raising some cash for a good cause.
Features a Marilyn Monroe impersonating content and a "Pink Party" to close down the festival.