Sadie the lady is a champ.

The elegant Scottish terrier overcame dog-eat-dog competition last night and wowed the crowd at Madison Square Garden to take Best in Show honors at the 134th Westminster Kennel Club Dog Show.

“She was perfect. I couldn’t ask for anything else,” said Sadie’s handler, Gabriel Rangel.

Sadie entered the show as the No. 1 dog in the country but had to go snout to snout with the No. 2 ranked show dog, a hard-nosed Doberman named C.J., who won the working group and was backed by a large segment of dog lovers at the Garden.

PHOTOS: WESTMINSTER DOG SHOW

THE LADY IS A CHAMP — AND A HORSE KILLER, TOO

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But judge Elliott Weiss was charmed by Sadie, a petite pooch with jet black eyes who happily paraded around with her tongue sticking out.

“A dog of this quality only comes along once every 10 years,” he said.

It was an historic win as Sadie became the first winner of the dog-show Triple Crown.

She had been named top dog at the National Dog Show in Pennsylvania in November and the American Kennel Club/Eukanuba National Championship in California in December.

The Westminster ribbon was her 112th best in show honor.

It was her third attempt at Westminster. Last year’s try ended dismally when she relieved herself on the Garden floor.

Rangel stopped short of saying Sadie would retire now that she’s won the big prize, but admitted, “She won everything she has to win.”

The handler described the canine world’s newest su perstar as a “happy” dog who “really enjoys herself.”

“She likes to watch TV,” Rangel said. “We have dinner together at the hotel and watch ‘Animal Planet.’ ”

The show was briefly interrupted by a protest when two women ran onto the Garden floor and held up signs reading, “Mutts Rule” and “Breeders Kill Shelter Dogs’ Chances,” a slogan often used by People for the Ethical Treatment of Animals.

The women were charged with criminal trespass. With AP