Audio: Scott Grimes and John Stamos singing "I Feel Good".
Both Scott Grimes and John Stamos are professional musicians and singers. Scott Grimes has released Livin' on the Run in 2005 which produced a Top 20 hit with the song, "Sunset Blvd". His songs have also been featured on the show previously, as well as singing performances on the show as well.
John Stamos previously was the lead singer of the fictional Jesse and the Rippers in the TV series, Full House. On the show he was shown to be able to play guitar, bass, piano, and drums. He also has performed with the Beach Boys on several tours.