Singer, writer, actor and comic Colleen McHugh employs all four of her hats each time she steps onstage. This week she lights up Signature Theater’s summer cabaret series in a show bursting with humor, music and zany improv. Titled “Change of A Dress,” it features songs inspired by fashion.

“The show was inspired by woman’s love of fashion and a list of songs associated with the September issue of Vogue,” she said. “Each year, it introduces the latest outfits for the coming season. The songs by composers ranging from Cole Porter to Irving Berlin have in common the theme of how clothes make you feel. There’s always an improv song that I write after getting a story from the audience concerning clothes. And at one point in the show, I change my dress to fit the story.”