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The Girls Aloud star has been preparing for the CiN gigs at Gary's house.
Cheryl Cole will perform with The X-Factor judge Gary Barlow at next week's Children In Need Rocks gig, according to reports.
The Girls Aloud star has apparently been rehearsing at the Take That singer's home ahead of the show at Manchester's MEN Arena.
"Cheryl hasn't done much TV this year at all and it has been a while since she sang live on stage," a source told The Sun.
"She has been busy in the studio working on her next album so her voice is in good condition but she wanted to get some serious time together with Gary before next week.
"They will have a big section together on stage at the MEN. It is going to be special."
The concert will also feature performances from Lady Gaga and Coldplay.