'So You Think You Can Dance' Crowns Season 15 Champion -- Find Out Who Won!

After weeks of competition, only one hopeful could be declared the winner of 'So You Think You Can Dance.'

In one of the most heated seasons of competition, So You Think You Can Dance crowned its season 15 winner on Monday.

It all came down to the show's fan favorites and front runners, Jensen Arnold and Hannahlei Cabanilla, who stood side by side as host Cat Deeley announced the night's big winner.

And after one of the closest voting tallies in recent memory, this year's winner is Cabanilla!

The dancer was beside herself with excitement as her name was announced and confetti rained down from the sky. The night's runner up -- younger sister of Dancing With the Stars pro Lindsay Arnold -- embraced her in a congratulatory hug.

Cabanilla was overcome with emotion when Deeley came up to her after winning, and the host asked her what she was going to remember most about being on the show.

"Just being on stage with all these amazing people," Cabanilla said through tears. "Having an impact on all these people's lives has just been amazing."

ET's Deidre Behar spoke with the 18-year-old contemporary dancer and newly crowned winner backstage after her victory, and she opened up about the incredible occasion.

"I keep saying this all season but it feels like a dream being here, and making it all the way to the end, being the winner, it's a dream come true," she shared.  "I can't even wrap my brain around it because I've been dreaming of this moment and it just happened and I don't know how I feel!"

For winning the season, Cabanilla is taking home a $250,000 grand prize, and she's already got an idea of the first thing she's going to buy.

"I'm going to take my parents on a trip, because they've supported me throughout this whole process and throughout my whole dance career and I just owe it to them," she shared, adding that she's planning on taking them to Greece.

However, a sweet Mediterranean vacation isn't the only indulgence she's got her eye on. She's also looking to accessorize, and said she wants to "go shopping" with some of her newfound money.

As for what's at the top of her shopping list: "A Gucci belt!" Cabanilla revealed. "Then I'll save the rest."

Cabanilla earned rave reviews during the season from the show's judges, Nigel Lythgoe, Mary Murphy and Vanessa Hudgens, and was one of the odds-on front runners throughout the competition.

Congrats to Cabanilla on being named America's Favorite Dancer!