The Boutelles have deep roots in Newport Beach. Maddy's mother, Carolyn, went to Ensign.
Maddy volunteered at her church, St. Andrew's Presbyterian near Newport Harbor High School, where she planned to attend in the fall. She also planned to volunteer at Hoag.
Several of Maddy's organs have been donated, which her family said she would have wanted after she donated her hair to Locks of Love a few years ago.
"I would like to say that Maddy was truly one of the most brightest, kindest and incredible people I will ever know," said her brother William. "She lit up every room she walked in with her smile and her always-uplifting persona. She wasn't just the sunshine — she was the sun."
In addition to William, Jack and Carolyn, Maddy is survived by her father, Matt; and sisters Ashley Kirkley and Allison Kirkley-Cassara.
A paddleout ceremony in Maddy's memory will take place off 24th Street in Newport Beach at 10 a.m. Saturday. A memorial service will also be held at 2 p.m. that day at St. Andrew's Presbyterian Church, 600 St. Andrews Road. The service is open to the public.