Who'd Have Known

"Who'd Have Known"
Single by Lily Allen
from the album It's Not Me, It's You
Released	30 November 2009
Recorded	2007
Studio	Home studio (Moreton-in-Marsh, Gloucestershire, England)
Genre	Pop
Length	3:50
Label	Regal
Songwriter(s)	Gary Barlow Jason Orange Mark Owen Howard Donald Steve Robson Lily Allen Greg Kurstin
Producer(s)	Greg Kurstin John Shanks
Lily Allen singles chronology
"22" (2009) "Who'd Have Known" (2009) "Just Be Good to Green" (2010)
Music video
"Who'd Have Known" on YouTube

"Who'd Have Known" is a song by English singer-songwriter Lily Allen from her second studio album, It's Not Me, It's You. Written by Allen and Greg Kurstin, while interpolating Take That's single "Shine", the song was released as the fifth and final single from the album on 30 November 2009 by Regal Recordings. Contemporary critics complimented the song and Allen's warm vocals, while the music video portrays her as a groupie of Elton John.

The song is prominently sampled in American rapper T-Pain's 2011 song "5 O'Clock", on which Allen is credited as a featured artist. "Who’d Have Known" was the last single Allen released as lead artist before her five-year hiatus.