1216_sarab_split Talk about brave!

Sara Bareilles sang a special duet with 4-year-old cancer patient Joshua at her House of Blues concert on Sunday in Orlando, Fla.

"I want to do something really, really special tonight," the singer told the crowd. "There is a very, very special, brand new friend of mine who has come to the show and I want to introduce him to you. You guys are going to fall in love with him the way that I did. Can we welcome to the stage… Mr. Joshua."

Joshua joined Sara on stage to sing her hit song, "Brave." It's the perfect song with the little one, who was diagnosed with Leukemia in February.

He certainly stole the show!

Check out the video above to hear him sing, and click here to learn more about Joshua's story of survival!

Hot Videos