Justin Bieber Stubs Out Cigarette On Post Malone, Covers Rihanna And Drake On Piano

Justin Bieber was seen using singer and DJ Post Malone's arm as an ashtray as he stubbed out his cigarette on his friend's bare arm in a Houston nightclub.

Bieber was filmed on a cellphone while Malone was performing his hit, "White Iverson," but he didn't seem bothered by the split-second burn inflicted by the Canadian popstar and just kept on singing.

Malone is one of the opening acts on Justin's Purpose Tour, and they appear to have become good friends on the road.

Post Malone and Justin Bieber are touring together. [Photo via Instagram/justinbieber]Just a couple of hours later, Justin Bieber was pictured inside a Houston nightclub with Post Malone grabbing his throat – but it's not clear the two incidents are linked, as the Daily Mail reports.

Malone can be seen with his left hand around Bieber's throat, but no one from their close entourage seems particularly worried about the Biebs, which could mean this is just the second part of a prank.

Is Justin going back to his old ways? The past few weeks have been fuelled with rumors surrounding his lovelife and on/off romances with Hailey Balwdin and Selena Gomez, as The Inquisitr reported.

Justin Bieber at the iHeartRadio Music Awards on April 3, 2016 in Inglewood, California. [Photo by Frazer Harrison/Getty Images for iHeartRadio / Turner]But besides his heatbreaker antics, Justin Bieber is also managing to keep up a good profile around his tour. He recently posted two videos on Instagram of himself covering "Hotline Bling" and "Work" by Drake and Rihanna. It's not the first time the Biebs has shown his skills on an instrument, and he's actually made acoustic interludes a main part of his persona, with at least a short guitar-voice or piano-voice intervention in most of the gigs he's performed over the past few months.

James Corden and Justin Bieber stroke up an unlikely friendship on the set of Corden's Late Late Show. Bieber has appeared on a couple of carpool karaoke installments, a favourite section of the show where host Corden welcomes recording artists and they sing through their biggest tunes while driving around.

On last week's Late Late Show, Bieber's lyrics inspired a soap opera, enacted by James Corden, Salma Hayek Pinault, Gary Oldman, and Ray Romano, Huffington Post reported.

Justin is also making a great impression on fans by showing an approachable and light aspect of his personality: he was recently filmed dancing with a cop in Houston, as reported by 13 News Now. Justin had stopped to buy a new hat and started an impromptu conga line with his friends, which HPD officer Dominique Moore joined, and the video has now gone viral.

Another impressed fan is dancing talent Izzy Burton, who won an audition to dance on stage with Justin.

Tides are definitely changing for Justin Bieber who's gone from favorite living target, in spite of his huge Beliebers fanbase, to talented artist who performs -- dancing, singing and playing instruments -- a great show every night.

And it sounds like Justin Bieber wasn't just busy messing around in Houston, where he also took some time to record a track in a studio, hours before performing at the Toyota Center.

So, what do you think: is Justin Bieber going back to his old days, or is he really growing up?

[Photo by Chris Pizzello/Invision/AP]