Bieber surprised fans with an appearance at Grande's gig in Miami
Singer joins Rudimental and McBusted as headline acts
Singer's bodyguard is reported to have abused Jeff Schwartz
Pair play 'Never Have I Ever' on US chat show
Singer was celebrating at Caesars Palace, Las Vegas
Singer tries to move on from his recent wild antics
Beliebers shown in tears before upcoming roast starring Snoop Dogg and Ludacris
Controversial pop singer is disappointed that comedian Seth Rogen won't be lining up to poke fun at him
Bieber was sentenced to service after egging his neighbour's house last summer
The popstar posted a picture of the pair together on social media