Britney Spears is said to be marrying fiance Jason Trawick "within weeks" of wrapping up her X Factor USA commitments at the end of the year.
The pop icon, who became engaged to Jason at the end of 2011, will be keen to take the spotlight off of her gruelling lawsuit against former 'manager' Sam Lufti.
A source told The Sunday Mirror: "She’s put a treadmill into her X Factor dressing room and is making sure she’s jogging as often as she can.
"She’s taking her look incredibly seriously and has said she will dazzle with her outfits and her body on the live finals of X Factor."
The source added: "It’s very much a countdown to the nuptials right now… We’re talking within weeks."
Brit has been given the Teens category to mentor, with Demi Lovato taking care of the Young Adults, LA Reid the Over 25s and Simon Cowell the Groups.
Khloe Kardashian and Mario Lopez were confirmed as hosts earlier this week.
Jason Trawick will be Spears' third husband, following her unions with Jason Alexander - annulled 55 hours later - and Kevin Federline.
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