Beach Boys concert July 5.Stamos, 60, proudly posted a video of the father and son duo to his Instagram, writing: “Had a little help from my son BILLY on Good Vibrations last night – Wasn’t it nice! @thebeachboys.”The clip shows Billy, 6, helping his dad perform a drum solo as he wears protective headphones. The little one previously played with the band in March 2023.The “Full House” alum is touring on the Endless Summer Gold tour with the band. The tour marks the band’s 50th anniversary of their album of the same name, which was released June 24, 1974.