Britney Spears has turned down the chance to make a second guest appearance on Madonna's world tour because of family commitments.
As previously reported, Britney appeared at a recent Madonna show in LA, the same show that a certain Justin Timberlake guested at. It was reported that Spears would also appear at Madonna's gig in Miami later this month, on 26 Nov, but she's reportedly pulled out after being granted custody of her two sons, Jayden James and Sean Preston, for the days running up to Thanksgiving, which includes the 26th.
One of those sources told The Sun: “Britney had always agreed to perform in Miami but her circumstances have changed over the past couple of months. She and [ex] Kevin [Federline] are getting along fine now, Britney will have Jayden and Sean just before the holiday and Kevin will spend Thanksgiving day with them”.