Jessica Simpson Weight Loss Ignites Drunk Nightclub Extravaganza [WATCH]: Weight Watchers Beauty & Baby Daddy Eric Johnson Party Hard In Hollywood

Jessica Simpson is Weight Watchers latest "It Girl" - and the mother of two looks absolutely stunning!

But such incredible weight loss also lowers one's alcohol tolerance. For example...

Simpson and fiance Eric Johnson were spotted partying at the popular Hollywood nightclub Warwick on Sunday evening (June 8). And apparently, the "A Public Affair" songstress had a bit too much to drink. All in good fun, though!

Simpson was spotted stumbling around with her gal pals while flaunting a sexy black dress. Apparently, she got the munchies at one point and had to order some takeout food. While still partying in the club...

Nice to see that the couple can still have a good time while simultaneously raising a happy and healthy family!