A Great Big World is an American musical duo formed in 2012, consisting of members Ian Axel and Chad Vaccarino. They gained widespread recognition with their hit song "Say Something," featuring Christina Aguilera, which reached the top of the charts and earned them a Grammy nomination. Their music blends pop and indie elements, characterized by emotional lyrics and melodic harmonies. The duo has released several albums, including "Is There Anybody Out There?" and "When the Morning Comes." They are known for their heartfelt performances and have toured extensively, connecting with fans through their relatable themes of love, loss, and hope.