Jackson angry with Timberlake

Janet Jackson has launched a blistering attack on pop hunk Justin Timberlake for acquiring a "cocky" attitude following their controversial super bowl performance.

The Damita Jo singer, 38, is still upset with Timberlake over his response to their collaboration in February in which she flashed a nipple - and she believes he is being led by his ego.

Jackson has also taken a swipe at Timberlake's career - insisting his R&B rival Usher is the greater artist of the two.

She says, "Justin's changed. He's gotten cocky.

"In a contest between Justin and Usher, Usher would win.

"Some people can handle success and some can't.

"I'm wondering if the latter is the case with Justin."