The Argentina international netted twice against BATE, three times against Plzen and once versus Milan to make it six from five games in the group stages.
The 24-year-old then found the net on six more occasions in the two round-of-16 games against Bayer Leverkusen, before adding two more to his tally in the quarter-final tie against Milan.
Messi was unable to beat Chelsea goalkeeper Petr Cech in the semi-finals, though, as Barca fell to a shock 3-2 defeat on aggregate.
|THE TOP FIVE SCORERS FROM THE 2011-12 CHAMPIONS LEAGUE|
|Lionel Messi (Argentina)
|Mario Gomez (Germany)
|Cristiano Ronaldo (Portugal)
|Karim Benzema (France)
|Didier Drogba (Cote d'Ivoire)
Bayern Munich striker Mario Gomez finished the campaign as runner-up following his 12 goals in 12 appearances.
Real Madrid duo Cristiano Ronaldo, Karim Benzema and Chelsea's Didier Drogba complete the top five with 10, seven and six goals respectively.