Justin Timberlake... good and bad news 

Justin Timberlake's croaky voice has forced the postponement of his New Zealand concerts, but it is not all bad news - he has announced a third show.

The 26-year-old is under doctor's orders to rest his voice this week following months of touring and a performance at the MTV video music awards.

That has seen his Auckland shows pushed back a month until November 23 and 24.

A third show has been added for November 26 and the tickets for that go on sale in two weeks.

Frontier Promotions says it will refund the ticket of anyone who can't make the new dates.

Timberlake's pal Christina Aguilera caused an outrage earlier this year when she cancelled her Auckland shows at the last minute.

The diva apologised to her Kiwi fans after ill health forced the cancellation of her shows at the Vector Arena.

However, it did little to dampen disappointment.

"I've been singing for years, I've saved up all my birthday money...and I've come all the way from Christchurch," one fan Susie Farmer said.

Another said, "We don't care if she's sick, she can just dance."

The 18,000 fans who bought tickets to Aguilera were given a full refund.