When you give a party celebrating Women in Music, the people operating the soundboard should know their way around it. Unfortunately, Elle magazine’s bash at the Music Box on Monday totally missed that part of the party equation. The bass thumping shook the walls and drowned out the performers.

The mag’s creative director, Joe Zee, kicked things off, saying, “Elle tries to defy convention, so our first performer is a man.”

They probably went with a fellow, Theophilus London, because most of the big-name gals celebrated in the mag’s May music issue couldn’t make it to the Music Box. Instead, Elle presented Beyonce’s little sister, Solange Knowles, who, along with her band, was dressed like the Family Stone circa 1972. By the time Robyn hit the stage, the stampede of Hollywood starlets out the door was evident. Spotted in the crowd were “American Idol” vets Jordin Sparks and Kara DioGuardi, along with Ariel Winter, Hayley Williams and Sophia Bush, who clung to boytoy Austin Nichols. Maybe she thought he had earplugs in his pockets.