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I'm sure if you type in "best rap artist" they might have their own answer rather than yours.
"IP Address Lookup" and "IP Address Lookup Service" do NOT trigger the report at the top of the results. They give normal SERPs from the various services.
"What is my IP address" does - it's the direct question, sort of like a "define" query.
[edited by: Sgt_Kickaxe at 4:19 pm (utc) on Oct 20, 2011]