On a Joysound survey of "which anime character you want to go to karaoke with", a certain infamous information broker came second amongst male characters, and the song they wanted him to sing was...
Ren'ai Circulation (Sengoku Nadeko/Hanazawa Kana)
(Here's the reminder if you need it!)
Whilst we're on the topic, Kida was third, with "Rinda Rinda" being the requested song.
Source: Yahoo! Japan