Roots of A Great Big World

Vladimir John Ondrasik III, known professionally as Five for Fighting, is an American singer-songwriter and pianist. He is best known for his piano-based soft rock, such as the top 40 hits "Superman " (2001), "100 Years" (2003), and "The Riddle" (2006). He also had a string of moderate hits on the adult contemporary charts in the late 2000s and into the 2010s, including "World" (2006) and "Chances" (2009).

Christina María Aguilera is an American singer, songwriter, actress, and television personality. An influential figure in music, Aguilera is noted for her four-octave vocal range, melismatic singing style, use of the whistle register, and continual reinvention of her image and sound. Referred to as the "Voice of a Generation", she was ranked among the greatest singers of all time by Rolling Stone. Her works have incorporated socially conscious and sexual themes, generating both controversy and critical acclaim.