Blair is the youngest of three boys raised by Gary and Mariellen Garner. His father was the director of the West Texas A&M University Band in Texas for 38 years. His oldest brother, Brad, followed in Gary's musical footsteps and teaches at the Cincinnati Conservatory of Music in Ohio, and at The Juilliard School of Music in New York. Blair's middle brother, Bryan, is a lexicographer in Dallas. Don't worry, Blair didn't know what it meant either. Actually, Bryan is a leading scholar on legal writing, and has several books published by The Oxford University Press. In his free time, Blair collects cars. At any given time, he usually has six to fifteen different cars ranging from Porsches and Ferraris to classic Cadillacs and Chryslers. Blair and his family reside in the Los Angeles area.

When asked about his amazing success, Blair quickly credits his parents. "My parents taught us all two very important lessons: First, my father taught us that if we were going to make a mistake, make it as big and loud and hairy as you possibly can. Commit yourself to it. If you're timid, you'll never reach the brass ring. Don't be afraid to fail. Secondly, my mom always told us that we were special. We could do anything we could dream. When you add those two lessons together, the results can be pretty powerful."