Iggy Azalea explains why Britney's 'Pretty Girls' under-performed...

Iggy Azalea has pointed out that lack of promo was the main issue behind 'Pretty Girls'  encountering a less than stellar chart performance.

She's right! That was partially the problem, as her collaborator and lead artist Britney Spears has now developed a phobia of promoting her material. Plus, the song did not resonate instantly with fans.

Many even claimed it to be one of the weakest lead singles of her career.

The song peaked at #29 on the Billboard Hot 100. On the other hand, there is always the possibility that fans didn't support it simply because Iggy was the featured artist!