Lindsay Lohan has completed rehab. She's clean and sober.

Oh, and she's gonna throw it down big time in Las Vegas when she turns 21 in July. Naturally.

"I'm going to milk it because it's a big birthday," Lohan said on Wednesday's The Ellen DeGeneres Show.

Lohan, who said recently she continues to hit the clubs even after rehab because she's lonely, also said she plans to gamble for the first time, although she'll need to "go and learn." We're willing to bet, though, that Lindsay's huge breasts an on display at the gaming tables.

Lohan, whose film Georgia Rule opens this month, notes that her birthday celebration may also have a quieter aspect.

"I'm to have a dinner in Malibu," she said. "I'm going to be with my family and friends."

According to a recent sighting at a bar, this would actually include Kim Kardashian. What a pair they must make.