"He's a happy, happy kid. All the time. No matter what."

Allison Kirby sums up her 16-year-old son, Westyn Rinehart, perfectly. The life of every party he attends. But this time, it's the party of his life.

Westyn just celebrated his sweet 16. His circumstances though are anything but sweet.

"When he was around 2, they found that he had a brain tumor," Westyn's aunt Alexandria Rinehart said.

WATCH: BA throws surprise party for terminally ill teen:

After years of surgeries and rounds of radiation, another tumor appeared in his latest MRI. Doctors say he only has months to live.

"Let God take control of the situation," Rinehart said. "There's a reason for everything, you just have to find it."

"Westyn is still just the strongest," Kirby added. "If you ever ask him if he has questions

See Full Page