In many of these videos, he portrayed his alter ego, Jimmie Walker Blue, the character he introduced during the semi-final round of American Idol. He picked up this talent purely by ear, listening to CDs of beatboxing, after he was inspired by Matthew Selby, a former member of the Los Angeles-based a cappella group M-Pact, of which fellow American Idol semi-finalist Rudy Cárdenas was a member.
Interestingly, Lewis has "Chris Sligh, Rudy Cárdenas", contestants from the sixth season of American Idol, listed as his own "American idols" on his profile on American Idol official website, while Sligh and Cárdenas also have Lewis on their lists.
Lewis's songs from American Idol have been on sale at the i Tunes Store and the American Idol official website as Blake Lewis - EP (called a "bundle" on Idol official website) shortly after the finale of Idol, along with other songs that did not make the EP's cut that are being sold as individual singles.
After Lewis' performance of "Lovesong" by The Cure/311 on March 27, Paula Abdul said that she would love to see him in the finale.
Cowell further confirmed that Lewis was the front runner of male contestants on American Idol.
Lewis, upon entering the top 2 on May 16, 2007, he thus became the first ever contestant from the Northwestern United States (specifically, Washington) to compete in the finale.
Lewis' beatboxing and scat singing skills had been featured occasionally throughout the competition, notably in the performances such as "Virtual Insanity", "All Mixed Up", "Time of the Season", "You Give Love a Bad Name", "You Should Be Dancing", "This Is Where I Came In" and "This Love".
All three judges acknowledged the huge risk of Lewis' arrangement, but also praised him for his originality including beatboxing.
Randy Jackson believed that it was the most original performance ever on the show.
Lewis claimed 311 as his all-time favorite band after his performance of "All Mixed Up".