What You Know (Two Door Cinema Club song)

"What You Know"
Single by Two Door Cinema Club
from the album Tourist History
Released	4 February 2011 (2011-02-04)
Recorded	2009
Genre	Indie rock post-punk revival dance-punk new wave
Length	3:09
Label	Kitsuné
Songwriter(s)	Alex Trimble Kevin Baird Sam Halliday
Producer(s)	Eliot James
Two Door Cinema Club singles chronology
"Come Back Home" (2010) "What You Know" (2011) "Sleep Alone" (2012)

"What You Know" is a song by Northern Irish band Two Door Cinema Club from their debut studio album, Tourist History (2010). It was released on 7 February 2011 as the album's fifth and final single. The song was written by Alex Trimble, Kevin Baird, and Sam Halliday and was produced by Eliot James. The song peaked at number 64 on the UK Singles Chart. "What You Know" was used for the 2012 Microsoft Outlook.com online adverts.^{[1][failed verification]}