Story highlights In a video, the singer appears to lick doughnuts in a shop before saying "I hate America"

Grande uploads an apology video, saying she is "disgusted" with herself

(CNN) Ariana Grande is sorry.

The singer posted an apology video on Thursday amid backlash from a video in which she appears to lick doughnuts in a shop south of Los Angeles and says she hates America.

"Seeing a video of yourself behaving poorly, that you have no idea was taken, is such a rude awakening, that you don't know what to do -- I was so disgusted with myself," she said.

"Not here to make any excuses or justify my behavior, because I can't. ... I'm just here to apologize."

In the video, originally released to TMZ, the 22-year-old celebrity seems to stealthily touch the doughnuts with her tongue before jumping up and down, laughing. Then, when an employee approaches with a tray full of doughnuts, the singer turns to a male companion and says loudly, "What the f*** is that? I hate Americans. I hate America."