By Will Robinson
December 13, 2016 at 11:34 PM EST

Kelly Clarkson’s take on “It’s Quiet Uptown” on The Hamilton Mixtape was an immediate standout. Her recent low-key cover of the number from Lin-Manuel Miranda’s acclaimed musical is no different.

The “Invincible” singer visited the Honda Stage at iHeartRadio NY to belt the emotional track. Clarkson was complemented by just a piano, sounding closer to the Hamilton version sung by Miranda, Renée Elise Goldsberry, and Phillipa Soo in the play’s second act.

Though the mixtape’s version is flawless, Clarkson admitted, “It was literally the hardest thing I’ve ever done in the studio.” Given that the 34-year-old recently had a son, Remington, the song’s subject matter about Hamilton’s dead child made it especially difficult.

“[Miranda] sent the song to me at like 1 a.m., and I sent an email back to him with a lot of expletives! I was so angry, because I was pregnant with my son, and it’s all about their son dying,” she told EW. “And I didn’t really know the situation, so I didn’t know if it was a baby, I didn’t know what it was. I was a complete mess, but I was like, ‘It’s beautiful. I’ll try and do it, but I can’t promise you I can get through the dang thing.'”

See the performance above.