Britney Spears'  teacup Yorkie, Hannah, is fighting for her life, Breaking Celebrity News is exclusively reporting.

In a week that saw Spears break off her engagement to Jason Trawick  and announce that she won't be returning to The X Factor, Britney had to return the tiny puppy to the hospital for the third time.

Brit introduced Hannah to her fans on November 24, giving the pup her own Twitter account as 'Britney's [expletive]."

She'd paid $1,800 for the dog at the Barkworks store in Thousand Oaks, CA.

Barkworks is a chain store that has come under intense criticism in the last few years for allegedly obtaining dogs from puppy mills and for false advertising, according to