Back When I Knew It All (song)

"Back When I Knew It All"
Single by Montgomery Gentry
from the album Back When I Knew It All
Released	February 25, 2008
Genre	Country
Length	3:59
Label	Columbia Nashville
Songwriter(s)	Gary Hannan Phil O'Donnell Trent Willmon
Producer(s)	Blake Chancey
Montgomery Gentry singles chronology
"What Do Ya Think About That" (2007) "Back When I Knew It All" (2008) "Roll with Me" (2008)

"Back When I Knew It All" is a song written by Trent Willmon, Gary Hannan, and Phil O'Donnell, and recorded by American country music duo Montgomery Gentry. It was released in February 2008 as the lead off single and title track from their album of the same name. The song debuted at #49 on the Hot Country Songs chart dated March 1, 2008, and on the chart week of July 12, 2008, it became the duo's fourth Number One hit.