Singer takes on 'Hotline Bling' and 'Work'
Bieber’s stand-in was a little stiff<br />
Bieber in currently on a world tour but won't be meeting fans before shows
The unlikely pair have been paying tribute to each other in recent weeks
Puth had said that he meant the remark as a joke
Singer was performing in Portland, Oregon on Sunday (March 13)
Singer had described Nate Diaz's style as 'terrible'
Pop sensation continuing recent journey into dance music
Singer helped charity single to the UK top spot in December
Singer delivered a freestyle that didn't make the final cut