Brittany Murphy was 28 in Happy Feet when she played the character 'Gloria (voice)'.
That was over 16 years ago in 2006.
In 2009 she died aged just 32, starring in 46 films in her career, 9 of those after Happy Feet was first released. If she were alive today she would be 45.
In Happy Feet, I think Brittany Murphy looks: