"We've never actually been asked by him," 1D member Liam Payne told us the other day at the W Westwood hotel, where the group was promoting their new line of Hasbro dolls and toys.
Besides, bandmate Louis Tomlinson thinks they may not be the right match.
"I think we both do quite different things," Tomlinson said. "We make different music. He's doing his thing, and we're doing our thing."
But while 1D and the Biebs may not be joining forces in the near future to create the ultimate heartthrob collaboration, they did come together on Thursday night following the MTV Video Music Awards to...cook?!
"At my house cooking some noodles with @NiallOfficial," Bieber tweeted along with a pic of the boys working their magic in the kitchen.
And three hours later, it was obvious that there were no plans to bring things to a simmer any time soon.
"Guys night in full effect," Bieber wrote.
Ah, to be young and energetic.