The Stronger rapper and the Bad Guy singer are both scheduled to headline the annual music extravaganza in California in April, but the 44-year-old star has been left unimpressed after Billie took an apparent swipe at his friend during one of her concerts earlier this week.

Kanye fumed on Instagram: “”COME ON BILLIE, WE LOVE YOU. PLEASE APOLOGIZE TO TRAVE AND TO THE FAMILIES OF THE PEOPLE WHO LOST THEIR LIVES.

“No one intended for this to happen." TRAV DIDN’T HAVE ANY IDEA OF WHAT WAS HAPPENING WHEN HE WAS ON STAGE AND WAS VERY HURT BY WHAT HAPPENED AND YES TRAV WILL BE WITH ME AT COACHELLA BUT NOW I NEED BILLIE TO APOLOGIZE BEFORE I PERFORM.(sic) "

The Ocean Eyes singer stopped her show at the State Farm Arena in Atlanta, Georgia, on Saturday when she spotted an audience member struggling to breathe and appealed to her crew to get an inhaler for the female fan.