A large number of concerts are held within the city, the larger ones being performed in St David's Hall, the Motorpoint Arena (previously known as the Cardiff International Arena) and occasionally the Principality Stadium. A number of festivals are also held in Cardiff—the largest of these is the Cardiff Big Weekend Festival, which is held annually in the city centre during the summer and plays host to free musical performances (from artists such as Ash, Jimmy Cliff, Cerys Matthews, the Fun Loving Criminals, Soul II Soul and the Magic Numbers), fairground rides and cultural events such as a Children's Festival that takes place in the grounds of Cardiff Castle. The annual festival claims to be the UK's largest free outdoor festival, attracting over 250,000 visitors in 2007.