Ashlee Simpson is blogging about her first night away from her 3-week-old baby. On Monday, Ashlee ventured out to hear husband Pete Wentz’s band Fall Out Boy play live in Hollywood for the first time since the birth of son Bronx Mowgli Wentz last month.

Hey everyone! I haven’t written in a while, just wanted to write and check in! Motherhood is the most fantastic experience I have ever been thru, Bronx makes me laugh and smile everyday! I finally left the house for Fall Out Boy’s show on Monday night, which was so good. Their new songs sound awesome live, I can’t wait for their new record! And last night I went to Pete and Bronx’s godfather Travis’ artshow. It’s amazing to see how many artistic outlets those boys have! Made me very proud. It was an awesome show and so many of our friends and family came out to support. I hope you guys have a great holiday, I can’t wait to spend it with my new family. Christmas tree goes up tomorrow!
XO Ash

It appears Mrs. Wentz won’t be much of a stay-at-home mom. In addition to her concert out on Monday, the “Bittersweet World” star was spotted hanging with Auntie Jess Simpson at Gallery 1988 in Los Angeles on Tuesday.

The sisters were there for the opening of the Without You, I’m Just Me show.