Singer-songwriter Usher has hinted at a collaboration with rapper Chris Brown.

The 35-year-old took to Instagram to share a photo of him posing in a car with Brown, who just completed his 90-day rehab stint, reports aceshowbiz.com.

"Yep me and Chris Brown. What happens next....Stay tuned 'Loyal'," Usher captioned the black-and-white photograph.

No further explanation was given, but it is said that he is readying a remix to Brown's single "Loyal", which is taken from his upcoming album "X".

Usher is currently seen as the coach on "The Voice".