Police investigating Ariana Grande's doughnut-licking video

California police said Wednesday they are investigating a video that appears to show pop superstar Ariana Grande licking doughnuts.

Police in Lake Elsinore, where the donut shop is located, say they and Riverside County public health officials were investigating the leaked video, which appears to show the 22-year-old and a man with her “maliciously lick” the doughnuts on top of a counter.

Mayra Solis, 22, a cashier at Wolfee Donuts who was on duty when Grande went into the store, said the singer didn’t purchase any of the doughnuts she appears to lick.

"She was really rude," Solis told The Associated Press.

Sheriff’s Deputy Michael Vasquez told the Los Angeles Times, they don’t believe a crime was committed, so Grande may not be investigated.

In the same video, which was posted by TMZ on Tuesday, also shows Grande blurting out “What the f--k is that? I hate Americans. I hate America."

Grande apologized for the comments she made in the video.

"I am EXTREMELY proud to be an American and I've always made it clear that I love my county (sic)," Grande told FOX411 in a statement. "What I said in a private moment with my friend, who was buying the donuts, was taken out of context and I am sorry for not using more discretion with my choice of words."

Grande said she chose to express herself as she did because she leads a healthy lifestyle and is upset with “how freely we as Americans eat and consume things without giving any thought to the consequences.”

"The fact that the United States has one of the highest child obesity rates in the world frustrates me,” she said in a statement to The Associated Press. “We need to do more to educate ourselves and our children about the dangers of overeating and the poison that we put into our bodies. “However I should have known better in how I expressed myself; and with my new responsibility to others as a public figure I will strive to be better."

Dottie Ellis-Merki, a spokeswoman for the Riverside County Department of Environment, said the agency was investigating why the doughnuts were left unprotected and exposed to the public, in violation of state food laws. She said investigators found no further issues at the shop Wednesday.

"During the investigation, the manager did state they normally don't leave donuts out like was shown in the video," Ellis-Merki said in an email to The Associated Press. "The employee went to the back to retrieve freshly made donuts by request of the customer and left the trays out while getting other trays."

Grande also addressed rumors that she pulled out of the MLB All-Star Concert because of the video after her representative said Wednesday the singer would not perform Saturday at the Paul Brown Stadium in Cincinnati.

"As for why I cannot be at the MLB show, I have had emergency oral surgery and due to recovery I cannot attend the show. I hope to make it up to all those fans soon."

A rep for Demi Lovato confirmed that she would perform Saturday instead. Lovato released a new single, "Cool for the Summer," last week.

The 86th MLB All-Star Game will air July 14 on Fox from the Great American Ball Park in Cincinnati.

The Associated Press contributed to this report.