Beyonce and Lady Gaga have hinted at a new collaboration.
The pair - who appeared together on 2009 hit Telephone and extended version Video Phone - have fuelled rumours they have returned to the studio by posting pictures of them wearing similar earrings.
In November, Gaga posted a photograph on Instagram of a pair of earrings engraved with the word Ratchet, while in December, Beyonce posted two photos of similar pieces of jewellery.
On 29 December, Beyonce posted a photo of the bamboo earrings alongside a pair of purple printed flat shoes, and followed it up the next day with another image of herself wearing the earrings.
It is thought they refer to a track called Ratchet, which is also set to include rapper Azealia Banks, and may be released later this month as the lead single from Gaga's new album, ARTPOP.
Azealia said in September: "I worked with Lady Gaga, but I worked with Lady Gaga from afar. We worked via email and via Internet. We have a song called Red Flame and a song called Ratchet, but I don't know what she's doing with it. She's going to release it when she wants to release it."
In October, Gaga confirmed plans to record with Beyonce again.
Asked in a Twitter chat if ARTPOP would feature a sequel to Telephone, she replied: "Fact".
Photo credit: PopCrush