Ultimate Bruno Mars Career Quiz: Test Your Knowledge

He wrote major hits for other artists before his solo breakthrough — most notably co-writing/singing on B.o.B’s "Nothin' on You" and Travie McCoy’s "Billionaire," which helped launch his solo career

He grew up performing in his family’s variety show in Hawaii (he sang Elvis impersonations as a kid) and took the stage professionally from age 4 — the “Bruno” nickname actually came from a childhood resemblance to wrestler Bruno Sammartino