Shake It! How Bootylicious Iggy Azalea Lost 15 Pounds

Bootylicious Aussie Iggy Azalea has shared her slimming secret — twerking!

The shapely rapper shed major weight while filming the video for her comeback track,

Mo Bounce, and admits she needed lots of practice to perfect her sexy moves.

“I did a lot of rehearsals actually, and, man, I lost 15 pounds in a week dancing to that song!” she says.

Now she admits her twerk needed work —

and she confesses she got lessons from pros on how to shake her money-maker!