Jessica Simpson got a little drunk at Hollywood hot spot Katsuya

The reality TV star and actress hit the town following days of a detoxing cleanse — and the booze went straight to her head!

“She had just finished a cleanse and this was the first meal she had eaten in days,” a source told New York Post gossip column Page Six.

Jessica Simpson chowed down fried rock shrimp, creamy crab rolls, spicy tuna and crispy rice.

Simpson was led out on fiance Eric Johnson’s arm and sat in their car’s passenger seat with her eyes half-closed.

Recent reports claimed Jessica is taking vegan cooking classes to impress her future husband.

“Jessica is determined to be more of a domestic goddess this time in regards to her marriage,” a source said.

“She hardly ever prepared meals when she and ex-hubby Nick Lachey were together.”