"I Know U Know", recorded by Tatiana Owens, is a song featured in the Person of Interest episode “Lady Killer”. It is played when Ian Murphy enters Club Blur.
"I Know U Know" is one of the few songs that is source music (sometimes called diegetic music). Unlike the episode's score, source music is heard by the characters in an episode and originates within the story itself.
Lyrics[]
Lyrics for this song can be found here.