Madonna has seemingly teased new lyrics in her latest Instagram post.

The singer sparked speculation last month that she is preparing to release a new single called Rebel Heart, after posting a picture of a sunset along with the title.

She has now posted a picture of a show jumping horse (seen above) along with the caption: “Without Collection there can be no Impulsion! #rebelheart”

Last month, she posted: “Day turns into night. I wont give up the fight. Don’t want to get to the end of my days……….saying I Wasn’t amazed! #revolutionoflove”

She recently confirmed that she is working with cult pop singer Natalia Kills and producer Martin Kierszenbaum on new material, and went into the studio with DJ and producer Avicii last month.

Madonna’s last studio album, MDNA, was released in 2012 and reached number one in the US and UK. She scored her 13th and most recent UK chart-topping single with 4 Minutes in 2008.