The Channel 5 series is due to start next month and won't finish until the last week of January.
It's the same time that the X Factor 2013 live tour will start, with dates starting in Manchester on January 26.
It means that it's unlikely that Rylan will be following Frankie Cocozza into the house this year.
Of course, there's still the summer series to come.
However, Rylan has apparently been offered £250,000 to enter CBB, which is some £150,000 more than he stands to make on the X Factor tour, so there's financially an incentive to go with Big Brother.... assuming XFactor bosses let him.
And with the singer reprising performances from the X Factor live shows this year, it's not as if Rylan has to put lots of time into rehearsals.
Speaking about the Celeb Big Brother rumours recently, Rylan admitted: "I heard that but I'm meant to be on tour with X factor!
"If I were to do the show, I would dread going in there and people seeing me without my make up on.
Also linked to the upcoming show is comic Jim Davidson and singer Meat Loaf, who has revealed details of a new UK Arena tour shortly after the show is due to end.
Steps singer Claire Richards, The Hills stars Spencer Pratt & Heidi Montag and model Lacey Banghard have all also been rumoured.
However both Justin Lee Collins and Katie Price have recently denied claims they're due to enter the house when the series starts next month.
[cat c="big brother"]Celebrity Big Brother UK[/cat] starts January 3 on Channel 5.