In December 2014 , Azalea told Kiss 108 backstage at their Jingle Ball Tour 2014 that their collaborative song would premiere in 2015 , " We have a song , which is going to be her first single , coming out next year . " Asked how the collaboration came about , Azalea added , " She said she would like to work with me in an interview and they reached out . We recorded a few different things and then one of those just ended up being , I think , undeniably great . Hopefully I think everybody will get to hear it at the beginning of next year . " In February 2015 , Azalea tweeted there were " epic " ongoing plans for the song . For Spears 's '' Billboard '' magazine cover story , published online on March 12 , 2015 , it was reported that despite Spears being back in the recording studio as back as in September 2014 working on a duet with Azalea , among other tracks , a proper full-length album would not be coming soon . Spears further explained , " I 'm gon na do a new album slowly but surely ... I 'm gon na try to do my best to do an amazing album , but it 's not my full priority right now " . Azalea confirmed the title of the track the following week . Afterwards , in Spears 's cover story with '' People '' magazine , it was announced that " Pretty Girls " would be released on May 5
Jingle Ball Tour 2014
Jingle Ball Tour 2014
Pretty Girls (Britney Spears and Iggy Azalea song)