“Who’s in My Bathroom,” and jokingly revealed that she slept with Bieber’s father, Stephen Baldwin — but then made it clear she was just kidding.On Wednesday’s episode, Bieber, 25, and Paltrow discussed a multitude of things, including the topic of Hollywood nepotism and Paltrow starring with Baldwin, 56, in the 1994 film “Mrs. Parker and the Vicious Circle.”Paltrow quipped on the show that she and the Long Island native were intertwined in an awkward on-camera moment together.She said that Bieber’s dad was “great” and “so nice.”The model replied: “I like hearing that.