Iggy Azalea and Charli XCX swap out their modern duds for retro styled outfits during her performance of “Fancy” at last night’s (May 20) Dancing With The Stars finale. The Aussie rapper battled early tech issues as her track was on a different pace but like a true professional she kept the show going.

“Iam so sorry guys! My in ears messed up and I couldn’t hear the track,” she tweeted after the performance. “The dramas of live TV. Shit happens. Still really enjoyed it.”

Later on, Iggy was joined by pint sized diva Ariana Grande to perform their hit “Problem.” Sticking to her monochromatic, black-and-white theme, Ariana graced the stage with her motorcycle crew and got the crowd on their feet.

Both Iggy and Ariana performed their hits during the 2014 Billboard Music Awards and have become quite the duo with each performance. Check out the performances below.

Iggy Azalea – Fancy – DWTS 18 (Finale) by IdolxMuzic

Ariana Grande performs ~ The Finale of 2014 DWTS by HumanSlinky