The Kiss frontman was there to cheer on the 19-year-old as she took to the stage during auditions in San Francisco, California.
TMZ reports that Simmons was not aware his daughter had plans to try for the show until she phoned him the previous night to reveal why she wouldn't be home for Father's Day.
Simmons cheered for his daughter as she sang for judges Britney Spears, Simon Cowell, Demi Lovato and LA Reid, although there is no word yet on whether she made it through to the next round.
Simmons follows in the footsteps of Jim Carrey's daughter Jane Carrey, was a contestant on American Idol in January.
Although she passed her first televised audition, she was axed from the show before its live stages got underway.