4:07   Electra Mustaine - I Thought I Knew It All 3:45   Megadeth - I Thought I Knew it All (Original) 3:45   Megadeth - I Thought I Knew It All (with Lyrics) 3:13   Electra Mustaine - I Thought I Knew It All (Behind The Scenes) 3:45   Megadeth - I Thought I Knew It All 3:48   Megadeth - I thought I knew it all (cover - all guitars ) 3:45   Megadeth - I Thought I Knew It All [Original 1994 Studio Recording] 4:16   Megadeth - I Thought I Knew It All (slowed & reverbed within HQ) 3:44   Megadeth - I Thought I Knew It All ( LEGENDADO PT_BR) 3:43   Megadeth - I Thought I Knew All - legenda pt/en 3:23   Megadeth – I Thought I Knew It All (Disco Redemption) 3:43   Megadeth - I Thought I Knew It All(D) 3:48   HEADLESS - I Thought I Knew It All (Official Video) ft. Andy Martongelli (Megadeth cover) 4:40   I Thought I Knew It All - Megadeth - Guitar + TABS Lesson 3:47   Megadeth - I thought I knew it all 3:51   Inception Video with ¨I Thought I Knew it All¨ [Megadeth] [Full HD] 5:48   Megadeth – I Thought I Knew It All | Country Rock Ballad Tribute by RDF