Pair worked together on Bieber's song 'Love Yourself'
Biebs also offers up an acoustic rendition of 'Cold Water'
Pop singer is lauded for placing 17 tracks in the US singles chart simultaneously
Fans were 'gutted' at rumours that star was not singing live
One fan wrote on Twitter that she was "gutted" the pop singer was allegedly not singing live
Singer insists ‘Sorry’ was about a girl, not his public mistakes
Bieber quit Instagram after a public spat with Gomez
Pair dated from 2010 to 2013
Bieber is reportedly dating Lionel Richie's 17 year-old daughter
Singer says fans are 'welcome' for his recent singles