'Sex and the City' stars unite for cancer benefit

The stars of "Sex and the City 2" will be in Brooklyn this weekend -- not to promote the movie, but to help one of their colleagues fight a battle against cancer.

As Sarah Jessica Parker explains in the video above, they're coming together to help out "Minty Python" -- the nickname for the 9-month-old daughter of Mei Lai Hippisley-Coxe, a wardrobe supervisor on the HBO series and Parker's costumer on the first "SATC" film and "Did You Hear About the Morgans?" Minty was diagnosed with a rare form of brain cancer shortly after being born and has been undergoing aggressive treatment ever since.