Summer, who died of lung cancer at the age of 63, was buried in a casket covered by white roses, reported TMZ.
According to the funeral program document, her siblings sung 'We've Come This Far By Faith' and her brother Ricky Gaines made a speech.
Her female friends also shared anecdotal "girlfriend stories" at the celebration of her life attended by her entire family.
Foster performed "The Prayer" with Natalie Grant, according to Universal Music Enterprises, Summer's record label.
The program also included a Psalm dedicated to Summer about "a wife of noble character".
The five-time Grammy winner passed away in Florida last Thursday.
A musical tribute was paid to her at the Billboard Music Awards 2012 on Sunday with Natasha Bedingfield singing 'Last Dance'.
