[Laurent]

Ashlee Simpson Becomes Ashlee Wentz
By Eileen Finan and Marisa Laudadio

Newly married Ashlee Simpson is changing her name to Ashlee Wentz in honor of her husband, Fall Out Boy Pete Wentz.

"I think that that's something that a woman should do when they're marrying a man," she tells PEOPLE. "It's a tradition that I think is a great tradition."

The singer, whose May 17 wedding featured an Alice in Wonderland-themed reception, says that privately she'll go by Ashlee Wentz and professionally she'll be Ashlee Simpson-Wentz.

Pete Wentz says he left the name change decision to his wife. "These decisions with Ashlee and her name are all completely up to Ashlee," Wentz says. "I want her to do these kinds of things the way she wants to do them."

Still, he admits, he was flattered. "Oh man, I was like upgrade me! You know what I'm saying? The Wentz family, our Christmas card just got upgraded!" he says. "It feels insane. It feels unreal."

Ashlee Simpson Becomes Ashlee Wentz - Ashlee Simpson, Pete Wentz : People.com

She certainly is going to a lot of trouble for a marriage that's likely to last a year at best.