“Stars Are Blind” singer, 42, revealed on Tuesday’s episode of the “Call Her Daddy” podcast that she’s returned to the recording booth.“I’ve been in the studio [with] Sia executive producing my full album,” Hilton said. “She’s going to be here tonight, I love her so much.”The hotel heiress noted that her forthcoming album will drop next year and how “honored” she was to collaborate with Sia, 47.The “Chandelier” vocalist is the “most brilliant songwriter of our time,” she added.“All About That Bass” singer Meghan Trainor also penned some “epic” tunes for the “sick” album.