It's been a hot year for up-and-coming artist Lizzo who has been performing all over the world. The "Truth Hurts" singer took the stage Thursday during Milwaukee's Summerfest in front of thousands of fans and although it was the "best show ever," she wasn't as pleased with the staff.

After headlining the festival's Harley-Davidson Roadhouse Stage, Lizzo took to Twitter to call out a "racist" security guard.

Moments later, the artist everyone is talking about shared a tweet with a video of the security guard, who she claimed "tackled and attacked" her team. The tweet has since been deleted, but according to the Journal Sentinel it read, in all caps, "This racist bigot put his hands on my people and used hurtful language while tackling and dragging my team off the festival grounds."

The Journal also reported that in the tweet with the video, the 31-year-old said: "They're keeping me from going over there and having my way with him, but I'm filming this right now just in case I need some evidence and just in case I need to put this on the internet." She continued, "He needs to be in handcuffs."

Despite the alleged altercation, Lizzo shared that her Summerfest performance was "the best show ever."

"Tonight was beautiful. You are beautiful. But the struggle ain’t over. Racism and bigotry don’t care if you’re a headliner," she later tweeted.

The "Juice" singer then thanked Summerfest and notified the organization that she would be "filing a complaint." It didn't take long for the world's largest music festival to respond via Twitter.

Following the incident, Lizzo is keeping focused and moving forward. The rising star is on her way to London to perform at Glastonbury Festival where she is scheduled to perform on Saturday night.

"On my way to London," she tweeted. "WHOOOOOOSAAAAAHHHHH."

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Lizzo attends the Met Gala "Boom Boom Afterparty" at Top of the Standard on May 6, 2019 in New York City. Rebecca Smeyne/Getty Images