iHeartRadio Music Awards 2015: Madonna Sings "Ghosttown" With Taylor Swift

Swift accompanied Madonna on the guitar at the Shrine Auditorium show on Sunday.

Madonna performed her ballad "Ghosttown" live at the iHeartRadio Music Awards on Sunday night.

The singer had a little help onstage — seated next to her was Taylor Swift, who accompanied her on the guitar.

Appropriately, the performance prefaced the show's award for best collaboration.

Madonna sang the Rebel Heart track after recently touting her single "Living for Love" at the Brit Awards and the Grammys.