Every morning, we comb through YouTube's search data to investigate top spiking search terms and the videos they lead to:

• hallelujah flash mob - As we've detailed here in the past few weeks, hallalujah flash-mobs are definitely the trend of the season, with very popular videos sprouting everywhere from Philadelphia to Canada to the Czech Republic. This morning, they're the top search.
  
  
• fdr pearl harbor speech - Today is the 69th anniversary of the WWII bombing of Pearl Harbor, and searches are spiking for President Roosevelt's famous speech.
  
  
• world of warcraft cataclysm gameplay - The new "World of Warcraft: Cataclysm" comes out today and searches are on the rise for clips of the expansion for the massively popular role playing game.