Haven't we all learned this lesson by now? Never mess with Taylor Swift — that chick has way too much power.

Diplo is kicking himself after feuding with the pop princess and feeling the wrath of her angry fans. Back in November, the DJ slammed the 25-year-old for not having a "booty," and still regrets his comment to this day!

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"All I know is don't ever get into a feud with Taylor Swift. She has like 50 million people that will die for her," he told 'GQStyle.' "You can't step into that arena. That was something I was never prepared for … one of the biggest mistakes of my career was definitely f***ing with her."

It doesn't help matters that the Grammy nominee happened to be dating Taylor's frenemy, Katy Perry, when he made the nasty comment about her — leaving fans even more angered and convinced the 'Roar' singer had something to do with it.

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Katy and Taylor during happier times in 2011.

"Taylor Swift is very strategic with her friends and enemies," Diplo continued. "And I know lots of secrets. I can't divulge, but I know a lot of stuff about her. And I'm scared. I'm scared for my life."

Since then, the 36-year-old has done a good job at staying on the 'Blank Space' singer's good side. The pair even snapped a photo at the 2015 Grammy Awards and appeared to be civil with one another.

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