The 'Never Leave You' singer was approached by show bosses - who are desperate for a British rapper to take part - after Chipmunk turned down an offer, The Sun reports.
While the line-up for the show - which returns to Channel 5 in early January - has not yet been confirmed, several stars have been linked with an appearance, including troubled Hollywood actress Lindsay Lohan, footballer Ryan Giggs' sister-in-law Natasha Giggs, shamed former 'X-Factor' contestant Frankie Cocozza and comedian Freddie Starr.
Meanwhile, bosses at Channel 5 are bringing back the live feed when the show returns next month.
Although 24 hour feed - which was axed when the show moved from Channel 4 to Channel 5 will not be coming back - show bosses are planning to extend the air time for an extra hour on sister channel 5* whenever there is an eviction, a surprise task or a shock new housemate.
A source said: "Zooming in after they've just had a shock is the best thing to do.
"In the past we've had housemates breaking down in tears if someone they really liked got evicted and we've had bitchy bust-ups with people saying the wrong person went out the door.
We've also had melt-downs if they heard the crowds outside chanting about them."