The former Los Angeles Laker and his daughter Gianna died Sunday in the crash, and as many as seven other people may have been killed.
Flames broke out at Jackson County Park, along the Tennessee River, about 12:30 a.m. Monday.
"I got three small kids and am trying to figure out how to navigate life with three kids and no mom," Matt Mauser said of the death of his wife, Christina.
"People have gaps in their life, and some people filled it in with Kobe," Salvador Galindo said.
"Earlier today, Los Angeles, America and the whole wide world lost a hero," host Alicia Keys said. "We're literally standing here in the house that Kobe Bryant built."