Both FERGIE and JENNIFER HUDSON are singing on the soundtrack for the May 30 'Sex and the City' movie, according to EW.com.

'Sex' director MICHAEL PATRICK KING says that Fergie sings the film's opening number, "Labels & Love," which is a totally new song that "has the 'Sex and the City' theme as the DNA -- on steroids."

And King says that Oscar winner Hudson, who also stars in the film as SARAH JESSICA PARKER's sassy assistant, sings the ballad "All Dressed Up in Love" over the closing credits "like nobody's business."