Pink, Brandi Carlile Honor Sinéad O’Connor with ‘Nothing Compares 2 U’ Duet

Sinéad O’Connor‘s death is prompting an outpouring of love from other artists … like Pink and Brandi Carlile, who paid their respects with an incredibly moving duet of her signature hit.

The 2 singers joined forces Wednesday night in Cincinnati, where they marked Sinéad’s passing by performing “Nothing Compares 2 U” for the crowd at Pink’s Summer Carnival tour.

It’s a pretty emotional live performance — the track, written by Prince, is about heartbreak and the feeling of being alone after losing someone … a fitting song in light of Sinéad’s death.

As we reported, Sinéad was found dead in a London home Wednesday morning — Scotland Yard says cops responded to a report of an unresponsive woman, but nothing was able to be done to save her once they arrived.

Sinéad faced tragedy in recent years, including the death of her 17-year-old son, Shane, who died by suicide last year. A cause of death for the 56-year-old singer has yet to be determined.