The Les Miserables actress - who won Best Supporting Actress at the 85th Academy Awards on Sunday (24.02.13) - was reportedly very concerned about the public's perception of her after she was criticised for becoming emotional and rambling while accepting accolades at other award ceremonies including the BAFTAs and Golden Globe Awards earlier this month.
A source close to the 30-year-old star told USMagazine.com: "She was very aware that she had been the butt of everyone's jokes," explaining that the actress practised her acceptance speech a lot to try to be more likeable.
Accepting her award from former Best Supporting Actor winner Christopher Plummer, Anne gushed: "It came true."
After thanking her co-star Hugh Jackman, cast and crew, she paid special tribute to her husband of five months Adam Shulman, saying: "By far and away the greatest moment of my life was when you walked into it."
Anne also performed songs from the musical live alongside the rest of the cast at the ceremony, which celebrated the theme of music in film and also featured performances from Catherine Zeta-Jones, Jennifer Hudson, Dame Shirley Bassey and Adele, as well as a number of other famous faces.
Despite her success, the actress insisted she still considers herself an "underdog" in Hollywood.
She said: "You're always looking for the next job. You always think at the end of one, 'It doesn't matter what's happened before, no one's going to hire me again.'"