Britney Spears shades Iggy Azalea's cancelled tour...

Britney Spears has thrown some subtle shade at Iggy Azalea after the rapper indirectly implied the lukewarm performance of their collaboration 'Pretty Girls' was down to Britney not promoting it.

"So thankful I have shows for the rest of the year to look forward to," she tweeted, which appears to be a clear stab at Iggy's cancelled 'Great Escape' tour.


Iggy has taken to social media to justify her comments. So is their friendship over before it began?