Ashlee Simpson Changing Looks - LEAD
Credit: Steve Granitz/WireImage; Jason LaVeris/Getty

Happy birthday to Ashlee Simpson! The 32-year-old has a lot to celebrate today, including two adorable children, 7-year-old Bronx Mowgli with former husband Pete Wentz, and 14-month-old Jagger Snow with Evan Ross, whom she married in 2014. And, while Ashlee is often linked to older sis and singer Jessica Simpson, it’s safe to say that the younger Simpson sister has made quite a name for herself all on her own.

After spending years in pursuit of a singing career and landing the hit MTV reality program, appropriately titled The Ashlee Simpson Show (2004-‘05), the singer now seems to have slowed her pace and is spending lots of time focusing on being a mom. And, not only do we love Ashlee's ah-dorable devotion to her kiddos, but we are also obsessed with how her look evolves. From frequently changing up her hair color and cut to constantly evolving her personal style, there's no denying that Ashlee definitely deserves an award for coolest mom with the best boho-chic style.

In honor of the star's big day, we rounded up the very best of Simpson’s changing looks. See her transformation through the years here.

Happy birthday, Ashlee!