The O2 Belfast (formerly known as The Odyssey and SSE Arena Belfast) is Belfast's leading musical venue. Located in the Titanic Quarter and opened in 2000, it's main arena sits 11,000 fans has seen the likes of One Direction, Metallica, Beyonce, Lady Gaga, The Who, Meatloaf, Black Sabbath, Katy Perry, and many more taking to its stage in recent years