Pop star Ashlee Simpson, who married Fall Out Boy bassist Pete Wentz earlier this month, is making what many in the entertainment world consider a surprise move: She’s taking her new husband’s last name.

“I think that that’s something that a woman should do when they’re marrying a man,” the pop star lil’ sis of Jessica Simpson told [People] magazine. “It’s a tradition that I think is a great tradition.”

While traditionally the wife assumes her husband’s name after marriage, these days women often choose to keep their maiden name or hyphenate the two–as Simpson plans to do in professional circles. (She’ll go by Ashlee Wentz privately.) What are your thoughts on the long-standing tradition: Is it old-fashioned, or do you agree with Simpson that it’s just something the wife should do?