Victoria Gotti

With their super-sized matching brassy blonde tentacle weaves already in place, Lindsay Lohan, 24, proved she has the look down to play Victoria Gotti, 48, at a NYC press conference for the Gotti family biopic today. This is a killer role for LiLo.

Lindsay Lohan beat out Blake Lively AND Sienna Miller for her new role as Victoria Gotti -- and TMZ has learned ... Victoria herself made sure that happened. Sources close to the production tell TMZ, producers were considering both Blake and Sienna for the role -- but John Gotti's famously blonde…