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AJ Mitchell celebrating 18th birthday in Hawaii as "All My Friends" climbs the charts 

Drew LevinYou Tuber-turned-pop star AJ Mitchell has a lot to be happy about.  Not only is he enjoying his highest-charting hit yet with "All My Friends," but it's also his 18th birthday on Friday, which he's celebrating in style with a trip to Hawaii.

Earlier this week, AJ told ABC Radio he was headed to Maui for a few days to relax and mark his big day, and he planned to take advantage of everything Hawaii has to offer.

"I just wanna see all the different places, I just want adventure," he told ABC Radio. "Like, maybe take a bike, go on a hike, cliff-diving...definitely go to the beach, but yeah, [I] just kinda wanna explore."

In addition to turning 18, AJ also has another milestone this month: He's graduating from high school, after completing his studies online while touring and recording.

"I literally have to take one more test and I'm outta school and never have to think about it again," he laughs.

Meanwhile, AJ's thrilled that his single, "All My Friends" -- about being the only one of your pals who's single because you're hung up your ex -- is climbing the charts.  Unlike most of his songs, AJ didn't write "All My Friends," but when someone on his team played it for him, he immediately connected with it.

"It was almost as if it was a song I wrote, just because it's so relatable to what's going on in my life right now," says the Belleville, IL native.

"It's like, it's literally something I would write. Like, all my friends ARE falling in love.  Y'know, they're locking it up, they're all in relationships...and it was just perfect."

AJ's debut album will be out later this year.

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