I love Bruno Mars because i was Born and raised in Honolulu as well. 
He's a great entertainer, but not necessarily the best musician.
He is one of the best though and he joined the best team when he signed a recording contract with Atlantic Records in 2009.
Atlantic have a history of putting out some powerhouses. I think The Beatles may have been signed there once
Do you know His debut studio album.  "Doo-Wops & Hooligans" was bomb. it  included the international and U.S "Billboard" Hot 100 number one singles "Just the Way You Are" and "Grenade"