Derek Hough's baby joy

Cheryl Cole's 'close friend' Derek Hough is celebrating the arrival of a nephew.

Derek, the dancer, tweeted: "Wahoooo !!! I just got me a new nephew .. Welcome to the world Quaid Randall Wise."

However it seems Derek got the name slightly wrong.

Minutes later he tweeted again, "Quad Robert Wise ... Healthy baby boy."

Uncle Derek and Cheryl are expected to share the weekend together in Las Vegas. The pair are expected to take in the sights and meet up with Derek's mum.