Just one week after news of their engagement hit headlines, Jessica Simpson and her beau Eric Johnson celebrated with an engagement party. UsMagazine.com reports that Simpson's parents, Joe and Tina, hosted a little get-together at their California home Thursday night for the newly betrothed.

About fifty guests, including Simpson's sister Ashlee and her husband Pete Wentz, attended the soiree and were treated to a causal array of cuisine. Hamburger and veggie sliders, chicken skewers, mini pizzas, shrimp, and mini cupcakes for dessert were served.

"They were very happy," a friend of Simpson's told UsMagazine.com. "It was the first time they had seen a lot of their friends since the engagement. She was excited to see her girlfriends."