Jason Mraz sings the song, and the title is Remedy.
Yes, Jason Mraz and Tristan Prettyman got engaged on December 24th, 2010. Mraz asked her via Twitter. After she responded, Mraz tweeted "SHE SAID YES." Subsequently, Prettyman tweeted "For Once, I Am Speechless, I did good! Holy crap! man of my dreams! For the rest of my life!"
No they are not dating. They are friends and in an interview he said the song is actually two songs. He would write some and send it to her and then she would write her part and send it back. It was just a fun thing they did.
Bruno Mars (with an "s") is a stage name. And I believe you mean Jason Mraz not marz. they are not related in any way.
The Matrix helped him on his first hit, "The Remedy (I Won't Worry)", which got his recognition, and he gradually became famous.
Jason released his first album "Waiting for My Rocket to Come" in 2002, but only got serious attention when he released his second album "Mr. A-Z" in 2005 which sold over one hundred thousand copies in the US.
102
They got 14 songs
3
about 16
5
There are 43 songs from all their albums but the side projects count for another 5 songs.