The Problem hitmaker was due to hit the stage with support act Rixton at Cincinnati, Ohio's Great American Ball Park this weekend, but she has pulled out of the gig as she is still recovering from dental surgery to remove three wisdom teeth on Monday (06Jul15).

Lovato will perform at the MLB All-Star Game Concert in Grande's place.

The news emerges just a day after the pop star suffered backlash online after declaring, "I hate America" during a recent stop at a donut store in Lake Elsinore, California.

Surveillance camera footage of the visit, obtained by TMZ.com, shows the 22 year old and her new boyfriend, back-up dancer Ricky Alvarez, appearing to lick various sweet treats on the shop counter when employees weren't looking.

The clip then features Grande expressing her disgust when one worker brings out a tray of oversized donuts, prompting the Florida native to blurt out, "What the f**k is that? I hate Americans. I hate America."