Iggy Azalea has never had a problem speaking her mind -- especially when it comes to her critics.

The 25-year-old Australian rapper popped up at the MTV Video Music Awards on Sunday to drop a surprise verse during her close pal Demi Lovato's performance of "Cool for the Summer," which plenty of people had a lot to say about on the Internet.

WATCH: Iggy Azalea on Why She Canceled Her 'Great Escape' Tour -- 'I Just Feel I Deserve a Break'

Not surprisingly, Iggy isn't letting the haters get her down. The "Fancy" rapper tweeted that she was actually "flattered" by all of the negative comments on Sunday. Responding to a tweet that reads, "I'm emotional Iggy the haters have been in my mentions for hours and all I've been trying to do is stop the hate," she replied, "Who cares it shows I’m very relevant in their lives still. I’m flattered. hahaha."

"It’s funny to see I was trending WW, man. Haters got SO MUCH to say. I was only on stage 30 seconds!" she added. "Wait till my new sh** drops, its 4 mins long! hahahahahaha...."

Iggy has been on the receiving end of plenty of negative press this year, thanks to canceling her Great Escape tour in May, beefs with everyone from Steve Madden to Papa John's Pizza, and her rumored plastic surgery. In June, she acknowledged her less-than-stellar reputation.

"It's really tough to stick by someone when the 'cool' thing is to hate on them," she tweeted. "Thanks to everyone who made the choice to stand by me."

But she has a loyal friend in 23-year-old Demi, who she's collaborating with on the former Disney star's new album, Confident. Demi's also actually going to be a bridesmaid in Iggy's upcoming wedding to her fiance, NBA star Nick Young. "She's pretty chill, so I can't imagine that she'll be one of those brides that will be super particular," Demi said of Iggy last month during an interview with a New Zealand radio station.

WATCH: Iggy Azalea Laughs Off Heroin Rumpors. Blames 'Evil Cat' Scratches

Watch Demi do a terrible impression of Iggy in the video below: