Live Nation is the largest live entertainment firm in the world with over 570 million fans served in 44 countries in 2018 by the company's concert and ticketing platforms. Via either owning, operating, or holding exclusive booking rights, Live Nation controls over 235 venues including the House of Blues, the Hollywood Palladium, and Spark Arena in New Zealand. Live Nation also owns one of the largest ticketing services, Ticketmaster, which sold over 480 million tickets for over 12,000 clients in 2018. The firm's artist management agencies have over 400 clients. This large live entertainment footprint helped Live Nation become one of the largest advertising and sponsorship platforms aimed at music fans. Liberty Media owns 34.9% of Live Nation, held under its Formula One tracking stock.