Iggy Azalea has updated fans on her upcoming duet with Britney Spears. 

The 'Fancy' rapper broke her Twitter silence to express her excitement for 'Pretty Girls', revealing that she will be performing the track with Spears.

"Hi just wanted to come online and tell you all how extremely excited iam for Pretty Girls to be released & that we are going to perform it 2," she tweeted.

Azalea added that she's still working on her next album, writing: "I'm still working on my album and things are going good. "work" type vibes, earlier fans will be happy 2 hear. love you all. bye. xo"

Azalea has described the track as a "true duet", explaining: "I love a good pop duet where it's equally powerhouse, cool."

Meanwhile, Spears previously shared a picture - seemingly from the music video to the track - along with lyrics to the song.

'Pretty Girls' is expected to be released in May.