5 Seconds of Summer's Luke Hemmings accused of using cocaine, escorts by ex-girlfriend

A 21-year-old boybander is facing allgegations of using cocaine and escorts -- and thanks to social media, all his fans are watching the drama unfold in real time.

Some background: Luke Hemmings, the lead singer for 5 Seconds of Summer, shot to stardom in 2013 when the band signed on to open for One Direction during their worldwide Take Me Home tour. Although the band hasn't released new music since 2015, Hemmings boasts more than 9 million devoted Twitter fans who eagerly follow his every move.

Earlier this year, Hemmings and then-girlfriend Arzaylea broke up amid rumors that she cheated on him at Coachella with singer Blackbear. Afterward, Blackbear posted a sexually explicit message on Twitter and followed it up with an Instagram photo of his crotch, on which he tagged Arzaylea.

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Months later, Arzaylea is back with a vengenance: The 22-year-old is now hurling serious allegations against her famous ex -- and his entire band. In a series of scathing posts on Sunday, the model commented on Hemmings' latest Instagram, which he captioned "2fast4u."

2fast4u 📸 @ashtonirwin

A post shared by Luke Hemmings (@lukehemmings) on

"Yeah you always did finish fast," his ex commented, adding, "Is that why he was still f---ing me the NIGHT before he went out with another girl? Y'all need to realize none of these guys are perfect. I'm over being the one in trouble lmao."

She continued, "We're gunna talk about the escorts. The cocaine. The cheating on ME. The lies. Everything that led up to me leaving YOU. IM TIRED OF EVERYONE THINKING THIS IS FOR ATTENTION VECAUSE [sic] DEAD A-- IVE BEEN HOLDIN IN MY PAIN FOR A YEAR. I MADE A MISTAKE BUT HE MADE A MILLION."

"The racism, judgment, and homophobia that happens in that group. It's disgusting. Y'all don't know the whole story. You will soon! xoxo"

Fans are in a tizzy over the drama, commenting back and forth about whose side they're on.

Hemmings has not yet acknowledged the allegations.

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