Singer/songwriter Rickie Lee Jones and country diva Emmylou Harris are among the musician/mothers gathering this weekend with other moms from around the U.S. to demand more on Mother's Day than flowers and a dinner at Sizzler.

The occasion is the Million Mom March — a national day of action to bring mothers and others together to demand common-sense gun laws.

"The gun-control issue is of vital importance to me," talk-show host Rosie O'Donnell said. She is the program's emcee, a mother of three and a gun-control advocate. "These Million Moms are an inspiration, and as a mother this is a personal issue. I'm going to Washington for the future safety of all children."

While Million Mom events will occur throughout the country, the main event will span the National Mall in Washington, D.C., on Sunday.

In addition to everyday working and stay-at-home moms, many musical mothers will take part.

According to a march spokesperson, the ever-growing list includes Rosanne Cash, Melissa Etheridge, Melissa Manchester and Ann Wilson (from Heart).

Other nonmusical celebrities going to Washington include actresses Susan Sarandon and Reese Witherspoon.

"The day will be emotional and a call to action," Donna Dees-Thomases, founder of the march, said. "Through our program, our passion and our presence, we plan to deliver our message loud and clear that sensible gun laws save lives."

Dees-Thomases came up with the idea for the event in August, in her suburban New Jersey living room. After watching the shooting at a Granada Hills, Calif., child-care center, she started telephoning friends, and within a month they had a National Park Service permit to march on Washington.

"This has grown tremendously, but we need every person who cares about this issue to join us on Mother's Day," Dees-Thomases added. "We are putting Congress on notice that we have had it with their inaction on this issue, and we are coming by the thousands to move them forward toward gun licensing and registration."