Rumsey was part of Futureproof, a boyband Louis Walsh formed from five rejects during the fourth series of the ITV show in 2007.
Mentor Simon Cowell later decided to put them through to the live shows, but they were eventually eliminated by the judges in the third week of the competition.
Five years on, Sean is now hoping the rival BBC talent contest will give him a second shot at solo stardom, similar to his former bandmate, Vince Kidd.
Kidd - real name Matthew Protheroe - finished fourth on last year's series of The Voice, as a member of Team Jessie J.
He has since signed a deal with Universal Island records and is gearing up for the release of his new single 'The Zoo', which features The Saturdays star Vanessa White, in June.
Sean - who has notched up over five million video views on YouTube with covers of various tracks - chose Maroon 5's number one smash Payphone as his audition song.
Tune in to BBC One tonight at 8.05pm to find out if any of the coaches decided to spin their chairs.