Sofia Vergara is hot and single again! Vergara broke up with fiancé Nick Loeb last week.

Page Six is reporting that the break-up was caused by Loeb's unrelentless attempts to market his salad condiment product Onion Crunch at the White House last year.

"She was appalled when he went to the White House as Sofia's plus-one and sneaked in a container of Onion Crunch, which he tried to get the president to pose with," said one source to Page Six. "He was on probation [for more than a year] with her after that, but, like a spoiled brat, never reformed."

Loeb admitted to The Post that Vergara was not happy with his shameless promotion of Onion Crunch at the White House.

"When [Sofia] found out [Onion Crunch] was in my pocket, she made me put it back in the car," he said. "But I snuck a couple of these little packets that I ended up handing to the executive chef at the White House."

Vergara's ex-fiance said, "I brought [Onion Crunch] to the Emmys, the Golden Globes, the SAG awards. I put them out on the tables or the buffets at the after-parties. I've taken pictures and tweeted them."

Loeb is the son of John L. Loeb, a Reagan-era diplomat who was once the head of the Wall Street firm of Loeb, Rhoades & Company, and the great grand-nephew of former New York governor Herbert H. Lehman.

The 'Chef' actress did not like his sense of entitlement.

"Since Nick lives on the Loeb and Lehman trust funds and doesn't want to have a real job, he is overbearing and bossy to be around," said the source to Page Six.

Loeb even asked Vergara to get him a part in her new movie 'Don't Mess With Texas,' with costars Reese Witherspoon.

"It really embarrassed Sofia," a friend said to Us Weekly.

"He desperately wanted her to use her star power to launch his acting career," the source continued, adding that Loeb auditioned for a part anyway without her blessing. "He made her look like a fool."

This isn't the first time Loeb has been jilted. Swedish ex-wife Anna Pettersson broke up with him less than two years after their wedding.