Last week, Rihanna told a reporter on the Diamond Ball red carpet that Anti, her long-awaited eighth album, is coming "soon." As far as Sia's concerned, though, that measure of time is completely up to interpretation.

In an interview with BBC's Jo Whiley, Sia, who most famously gave Rihanna the gift of "Diamonds," shared that RiRi is STILL LOOKING for material for the new EP. The singer recently dropped by Sia's house in search of the perfect additions.

"The other night she came over and listened to half of 25 songs I played her—'cause she's still looking for songs for her new album," Sia explained. "She took four, but I don't know if they'll end up...I'm pretty sure I have one on the next album, but I don't know if I'll end up with more."

And though Sia and Rihanna's working relationship extends back a few years, Sia explained the recent listening session was the first time they'd genuinely met. In a recent interview of Rolling Stoneshe explained RiRi's typically not around to record.

"They’ll entice me into a session by saying, ‘Rihanna will definitely be there’ or ‘Kanye will definitely be there,’ but it’s hilarious because I turn up and, almost always, they never come," she said.

What do you make of Sia's bomb-drop? Listen to the full interview below and share your thoughts.

Do you really know Rihanna? Test your knowledge:

See Rihanna stun on the Diamond Ball red carpet:

More From B93