LOS ANGELES — It's half past midnight in West Hollywood, and Australian singer-songwriter Troye Sivan halts when he hears his friend Leland utter, "OH MY GOD!"

Sivan, thinking someone had died, glances at Leland's iPhone only to discover that Taylor Swift and her Midas touch gave his new EP WILD an all-caps stamp of approval.

GO @troyesivan WILD IS STUNNING AND AWESOME. (YES CAPS LOCK IS NECESSARY HERE.) #EPgoals — Taylor Swift (@taylorswift13) September 7, 2015

Heart racing, Sivan sprints down the street, arriving at a friend's apartment, where he calls his mother using FaceTime to celebrate. He then calls his managers and everyone freaks out for 30 or so minutes before Sivan tries to unwind, to no avail, by watching I Am Cait.

"Insanity ensued," he told Mashable, describing the post-tweet moments, days later. "I hardly slept that night — feels so amazing to be validated by someone who I look up to so much." His euphoric response is what you'd expect from a fresh-faced musician, or most artists internally waiting for the often-elusive feedback from their megastar peers.

Sivan, before securing a record deal, launched his YouTube career eight years ago when he was 13 years old with a clip of himself singing Declan Galbraith's "Tell Me Why." He naturally looped in his millions of dedicated online followers, many of whom were already sharing in his excitement.

GUYS TAYLOR swift WHAT IS HAPPENINGHHGGGGGJWHWNWJSNBEHWNWJWJGAHE — Troye Sivan (@troyesivan) September 7, 2015

@taylorswift13 TAYLOR THANK YOU SO MUCH. This means the world to me!!! 1989 is most definitely #AlbumGoals — Troye Sivan (@troyesivan) September 7, 2015

Now 20, Sivan isn't new to the music scene. His debut EP TRXYE in 2014 earned him spots on Billboard's 21 Under 21 and Time's 25 Most-Influential Teens.

But mere days after releasing his sophomore effort WILD on Sept. 4, Swift swooped in with her powerful endorsement, which extended beyond Twitter.

On Instagram and Tumblr, Swift wrote, "Vibes. Mood. Feelings."

Vibes. Mood. Feelings. A photo posted by Taylor Swift (@taylorswift) on Sep 7, 2015 at 12:31am PDT

The effects of her words had an immediate impact: Sivan's global streams on Spotify increased 20% day-over-day on Sept. 7, a Spotify spokesman told Mashable.

The spike can be attributed to a combination of Swift's digital thumbs-up, the curiosity from her followers who didn't know him, and the fervor from Sivan's existing fanbase.

"She has set such a high bar for songwriters with her ability to craft a song that getting a tweet of affirmation means everything," Leland, a songwriter himself, said.

Around 3 a.m. that night, Swift humbly noted on Twitter that WILD moved ahead of her unstoppable sales monster 1989 on iTunes' top albums chart.

@troyesivan Look at us sitting next to each other like that pic.twitter.com/IIUC2Qhq1y — Taylor Swift (@taylorswift13) September 7, 2015

Lyrically and sonically, Sivan’s WILD breaks free from the bland pop churned out by his 20-something counterparts. The lusty EP — which catapulted to No. 1 on iTunes in 41 countries on just preorders alone — comes out of the gates with a title track exploring his feelings for a childhood crush that are now manifesting into a budding relationship as young adults.

The "WILD" video, the first in a three-part storyline, has caged 2.5 million views since its Sept. 3 release. Part one ends with a years-in-the-making bedroom kiss. What's next?

"You can expect to feel all of the feelings; I really wanted to strike a chord with people with these videos," he explained. "I want to provoke thoughts and conversations, and hopefully inspire some change." The EP's remaining five tracks are relentlessly experimental, anchored by introspective lyrics of relatable young love and loss, co-penned by songwriter Alex Hope.

"BITE" dives into Sivan's cautious maiden voyage into Australia's gay club scene. "So kiss me on the mouth and set me free, but please, don’t bite," he sings on the track produced by Leland, Allie X and Bram Inscore. Sivan notably posted a "coming out" video on YouTube in 2013.

The song for the upcoming second part in his video trilogy, "FOOLS," details a shattered relationship and the subsequent sorrows associated with the brutal breakup.

Life gets even gloomier on the reflective "DKLA (Don't Keep Love Around)" with a fiery assist from teen rapper Tkay Maidza. "FOOLS" and "DKLA" have the forlorn vibe of TRXYE's "Happy Little Pill" from returning producers SLUMS and Jia Lih.

"EASE" — Sivan's favorite song he's written — uncovers his homesick emotions alongside New Zealand duo Broods: "I'm down to my skin and bone, and my mommy, she can't put down the phone, and stop asking how I'm doing all alone, alone. But the truth is the stars are falling, ma, and the wolves are out calling, ma, and my home has never felt this far."

Sivan gets the silent treatment on "THE QUIET," but we feel his pain loudly.

"To finally have people living to these songs, it means the world to me," he said, adding that he's ready to perform them live starting in October. "I just cant wait to bring the music to life. It’s going to be intimate, dark and hopefully very entertaining."

Meanwhile, Swift will end 2015 on the 1989 World Tour in Sivan's home country.

Her Australia stops would be the prime time to bring Sivan as a special guest.

"The height issue will be a little comical to see, but I’ll endure it," he quipped.

BONUS: 25 Standout Taylor Swift Lyrics From '1989'