Charlie Puth Reveals Liam Payne's Surprising Studio Habits!

Charlie Puth is spilling on Liam Payne‘s weird habits in the studio!

The “Attention” singer co-wrote the former One Direction member’s hit song “Bedroom Floor,” so they’ve spent a lot of time together.

“That was the most fun I had ever had, writing that record,” Charlie told Billboard. “We were all at Conway, which is a really nice recording studio. And we were all just messing around; nothing was really coming when we were writing.”

“I just pictured what a leprechaun would sing, because I think there were Lucky Charms in the room or I had had them for breakfast,” Charlie continued. “Like, what would a leprechaun melody be? [Sings "Bedroom Floor" hook.] And Noel [Zancanella], who works with Ryan Tedder and OneRepublic, had this cool sound like ‘boom boom boom’ and I was thinking, ‘Oh, it could be like a dance record or something like that.’ And out of nowhere, that melody, that joke melody I had, fit perfectly on to one of the dancey chords. … We were dancing around, such a fun songwriting session.”

“I think some time went by, like six months, and I played it for Liam when he was in the studio,” Charlie added. “And fun fact, he has no air conditioning in the studio. He keeps it at about 80 degrees. He drinks warm milk … and sings the song perfectly. I don’t really understand how that’s possible. I mean, it works for him. I don’t know if I would be able to pull that off — I go to bed at like, 9 p.m. every night.”