**Gross Sales                                  Year Released**       
  1. Knocked Up $148,734,225 2007
  2. Pineapple Express $87,341,380 2008
  3. Dude, Where’s My Car? $46,729,374 2000
  4. Cheech and Chong: Up In Smoke $41,590,893 1978
  5. How High $31,155,435 2001

(Figures retrieved from IMDB.)