Jessica Simpson posted a new photo of her adorable son Ace Knute on Twitter over the weekend and wrote, "My snuggle bug..." All together now: Awwww!

Jessica gave birth to her second child in late June, and she dropped the baby weight much more quickly this time around. What's her main motivation? Fitting into a wedding dress later this year! “Knowing that I have the wedding coming up is an incentive to stay on Weight Watchers, count my points and stay in the gym,” Simpson says in the newest Weight Watchers ad. “I mean, when you see my dress, you’ll know!”

Simpson used Weight Watchers’ two-week Simple Start program, which she said allowed her “to completely refocus and jump right back on track to weight loss and feeling amazing about myself." She added, "I’m just trying to feel good in a pair of jeans and T-shirt. I can’t wait to be able to feel just comfortable in my skin and know that I’m back to the person I’ve been before. I know this time I’m going to be so much stronger and so much more empowered, because I really earned it and I really got here, and took the steps to get here.”