Describing himself as an acoustic beat boxing folk punk reggae artist at his first audition for the panel last year, Si left the coaches in hysterics with his performance.
He first performed Men At Work's Down Under before going on to sing his own song 'Chicken Train'.
Ex-coach Kylie Minogue branded Si’s act “kind of amazing” but she was clearly not a fan of the acoustic beat boxing folk punk reggae movement after not spinning like the other coaches.
This weekend Si is back and is serious for a turn.
Since his appearance at the Blinds last year, Si is approached by fans for selfies, and has been in demand for gigs.
The 43-year-old - who began singing at 24 - performs Glen Hansard & Marketa Irglova's Falling Slowly in a bid to make it through to the battle round stages.
Other acts singing for a spin on Saturday night include Beckenham duo The Rise, brother of Sheridan Smith Damian Dalton Smith and Londoner NK.
The Voice UK airs Saturday night on BBC One.
Browse pictures of this weekend's contestants here...