Seems like there aren’t any hard feelings between “Dancing With the Stars” hoofer Derek Hough and “American Idol” host Ryan Seacrest – who broke up with Hough’s sister, Julianne, months ago.

Derek and Ryan were “hanging out all night,” and even, “talking to girls, and dancing together,” said spies at a Halloween bash at No Vacancy in Hollywood.

A guest at the 1920s bordello-themed party for Treats! Magazine said that Derek — dressed as a punk rocker — also took “Breaking Bad” star Aaron Paul’s wife, Lauren Parsekian, for a friendly spin on the dance floor and showed off his swing-dancing moves.

Burlesque performers entertained costumed guests including Paris Hilton, Jeremy Piven and Russell Simmons at the Jose Cuervo Cinge-sponsored bash.