This is the moment that Cameron Diaz shaves off her glorious blonde locks in upcoming movie, My Sister's Keeper.

The Hollywood beauty's character - a mother-of-three - does a Britney Spears in a show of solidarity with her eldest daughter Kate, who is battling leukemia.

The film follows the lives of the Fitzgerald family, who conceived their youngest child Anna - played by Abigail Breslin - as a genetic match for Kate (Sofia Vassilieva) Jason Patric also stars in the movie, as does Alec Baldwin.

Can stars alongside Jason Patric and Alex Balwin in the flick, which is set for release in the US and the UK on June 26.

See more big screen slapheads below