As a Weight Watchers spokesperson, the 33-year-old mom of two has worked hard to shed her baby weight, losing a reported 60-70 pounds.
Her adorable 2-year-old daughter Maxwell couldn’t make the event. Simpson told reporters, "My daughter wasn't ready for a red carpet today. So that wasn't going to happen yet, but maybe next year."
Simpson’s fiancé Eric Johnson was in attendance, however, and Jessica posted a cute Instagram pic!
Other stars there included Amy Adams, James Van Der Beek, Courtney Love, Joe Manganiello and Rachel Zoe.
Varvatos said he hoped to raise $1.3 million to go toward Stuart House, a program at Santa Monica-UCLA Medical Center's rape treatment center for sexually abused children.
Fashion mogul Jessica Simpson showed off her svelte figure in a canary yellow dress at the John Varvatos Stuart House Benefit in Los Angeles on Sunday.