There was a rift between the two singers reportedly in 2013, when Bieber was dating Selena Gomez.
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The Same Old Love singer is concerned that Bieber is 'pushing himself too hard'.
Hundreds of super-fans took to the streets of Buenos Aires on 21 May.
The 22-year-old singer won Top Male Artist, Top Hot 100 Artist and Top Social Media Artist at the awards show.
The Weeknd won eight awards following his 19 nominations in 16 categories.
Annual awards-ceremony opening saw outrageous outfits from music's biggest stars, ahead of a sensational night.
Justin Bieber, Rihanna and Celine Dion to perform at Las Vegas awards on 22 May 2016.
Ariana Grande feels that Selena Gomez should be known for her great records: "Call her by her name!"
Ludacris and Ciara host awards ceremony in Las Vegas on 22 May 2016.
Sorry singer posts two pictures from Gosling's 2013 movie, The Place Beyond The Pines, on Instagram.
Battlefield 1's reveal trailer is currently the most liked trailer on YouTube across video games, movies and TV.
Bieber has had a few run-ins with the country's law since performing his last concert in Bueno Aires in 2013.
The Canadian singer is now focusing his life on nature and religion.
The two were spotted at an after-party held at Light nightclub in Mandalay Bay, Las Vegas.
Canadian star alarms fans with his abnormal behaviour while on his Purpose world tour.
In March, the singer announced that he will no longer conduct meet-and-greet sessions at his concerts.
The 22-year-old revealed his new tattoo on Instagram on 7 May.
Selena Gomez and Justin Bieber dated from 2010 until 2014 before splitting ways.
The couple dated on and off for five years.
Bieber posted a picture on Instagram where he can be seen sporting a tiny cross below his eye.
The Die In Your Arms singer was the first person Gomez performed her latest song for.