MISTLETOE "I DO" FOR CARRIE UNDERWOOD

Hate to ruin a star’s holiday surprise (okay, I’m lyin’) but country cutie CARRIE UNDERWOOD can stop dreaming of a white Christmas because you’re gettin’ something even better, girl – a white diamond Christmas!

An insider bustin’ with this joyeux noel news reveals that Carrie’s beau, Ottawa Senators hockey jock MIKE FISHER – who birthday-gifted her with a $5,000 Tiffany diamond necklace – just started shopping for a diamond bling he’ll slip on her naked finger after proposing under the mistletoe.

“Mike’s been itching to pop the question, but was scared of being turned down,” said my source. “Then Carrie began hinting about how pretty a big rock would look on her left hand – and he took the hint!”