The songs producer, William Orbit came out to defend Britney...

 

He posted this on his Facebook:

 

"I'd like to affirm that ANY singer when first at the mic at the start of a long session can make a multitude of vocalizations in order to get warmed up. Warming up is essential if you’re a pro, as it is with a runner doing stretches, and it takes a while to do properly. I’ve heard all manner of sounds emitted during warmups. The point is that it is not supposed to be shared with millions of listeners."