Never judge a book by its cover! 🤯🎸 64-year-old granddad Kenny Petrie walked on stage looking completely unassuming... and then MELTED FACES with an absolute rockstar guitar solo! 🔥⚡️ Did this plot twist completely blow you away? Drop a 🎸 in the comments if you were rocking out! 👇 #KennyPetrie #BGT #BritainsGotTalent #TalentRecap #Rockstar #GuitarShred #ViralAudition #PlotTwist