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LOS ANGELES, CALIFORNIA - SEPTEMBER 27: Meghan Trainor attends 'Meghan Trainor visits the SiriusXM Hollywood studios' in Los Angeles on September 27, 2019 in Los Angeles, California. (Photo by Emma McIntyre/Getty Images for SiriusXM)

Being bad never sounded so good. Meghan Trainor’s “All About That Bass” and “Bad Guy” mashup is the collaboration you didn’t know you needed.

When Trainor visited BBC Radio 1 on Wednesday (Jan. 8) she was asked to play a little game called “Your Lyrics Different Song.” The rules of the game are pretty simple, an artist sings one of their songs over the beat of, you guessed it, a different song. Trainor chose to sing “All About That Bass” over Billie Eilish’s “Bad Guy” turning her 2014 hit into something a bit more menacing.

Trainor had a few different words to describe her mashup, some of which are NSFW. “I was like, ‘This a f—in’ bop,'” she said on BBC. “Oh sorry! This a bop!”

Later Trainor posted a clip of her singing said bop with the emoji-filled caption, “I [green heart] Billie Eilish so much.”

Trainor’s third album, Treat Myself, drops Jan. 31. It’s her first solo album in four years.