Ed Sheeran Got Hilary Duff Out Of Bed To Record A Song

Ed can be 'really intimidating' in a recording studio, Hilary says.

NEW YORK -- Now we all knew that Ed Sheeran wrote a song for Hilary Duff, but it turns out he's singing on the track too!

Yep, you heard that right: Ed and Hilary on the same song, singing at the same time. Seriously, if that Hilary and Harry Styles collaboration comes together, my head might just explode.

Related: We're All About Hilary Duff's 'All About You' Video Teaser

MTV News caught up with Hilary at a Trident Spread Smiles Across America event in New York recently, where she revealed that Ed did "all the background vocals" on the song, after waking her up in the middle of the night to record the track.

"He had been doing a promo day in L.A. and he's like, 'I know you have a 2-year-old, but could you please come and record at midnight?' " Hilary recalled. "I was like, 'I've already been in bed for three hours by midnight on most nights,' but of course for him I did, and I'm such a huge fan --he's so talented."

Luckily, Duff wasn't up for too long since it only took her two hours to record the song, called "Tattoo," but it was an intense and quite intimidating two hours.

"He vocally produced it and came in the booth with me. I was really intimidated because, normally, they don't do that, so I kept looking up and being like, 'You're Ed Sheeran and I'm singing the song that you wrote and I want to do right by it,' " she admitted. "It was awesome and then he, in like 15 minutes, did all the low stuff and the harmonies and the background. He just musically has to put in no effort it seems; it's just him."

We get to hear the song when Hilary's album drops next year.