Falsetto is a singing technique where someone, usually males, sing in a higher pitch than their natural voice. It creates a lighter, thinner, and more breathy sound. Full definition
You're wrong to use Robin Thicke as an example with Michael Jackson — although Robin Thicke sings «some» of his songs in falsetto voice (his current hit is an example), his natural speaking voice is very deep... and terribly sexy... new fans are surprised at his vocal range when they see him in concert. (datinggoddess.com)
Scabbia hits peaks with high falsetto for the first released single. (slickstermagazine.com)
When it comes to early - morning wailing guitar solos and screaming falsetto vocals, it's got the others beat. (canadianbusiness.com)