Usher and Tinie Tempah on the X Factor leaders are revving.
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The US superstar is being lined up to give Kelly Rowland a hand with her acts, while London rapper Tinie judges' houses stage of the next month is set Tulisa Contostavlos.
A source told The Sun, "Kelly has a lot of friends in high places but has asked Usher to be her wingman".
"He loves the show as he's been on it a few times and gets on well with Simon Cowell and the top brass. Plus, he knows a thing or two about finding new talent as he was the man who discovered Justin Bieber."
Tinie Judge Gary Barlow's new show and have been contacted by the show's producer.
Speaking about the Pass Out star, the source said: "Tulisa knows Tinie really well and would love for him to join her with the contestants once they are through bootcamp. Gary is also close to Tinie and has been working with him on the new Children In Need single."
Robbie Williams, Gary's right-hand man when Sharon Osbourne Louis Walsh is a consultant to.
