Apparently one of Sia's best songs is going to be on Beyoncé's mythical new album according to the lady herself (Sia, not Beyoncé).
In a Twitter exchange with some fans who asked her why she didn't give this 'Elastic Heart' song to Beyoncé, she replied: "I gave her my other best song".
When someone else asked if that song was H&M soundtrack favourite 'Standing On The Sun', she said it was another one and then when they said they hoped it was going to be on her new album, she replied: "it did".
You can see this whole chain of events here if you like (she seems to have deleted some bits of it from her account).