Bruno Mars has a pretty good voice, don't you think?
Yes, he's also a good songwriter, choreographer, and producer too.
what is his real name? do you know?
His real name is Peter Gene Hernandez lol
WHAT? That's crazy! I've learned something new today lol So he is Hispanic! Where was he born?
Yep, and he was born a raised in Honolulu, Hawaii. 
When did he become famous? When did he start singing?
He started pursuing a singing career at a very young age, when he started performing at various venues in his hometown.