#BackstreetBoys fans who couldn't get tickets to the band's residency at the #Sphere shouldn't be too bummed ... as #BSB member #HowieDorough just gave an impromptu performance while out and about in #LasVegas. Full story at the 🔗in bio! #Exclusive story at the 🔗 in bio! 📹:Courtesy of The Barbershop Cuts & Cocktails