The singer, 20, chose to wear a see-through fishnet dress with just a thong and a pair of nipple pasties underneath when she arrived backstage at the iHeartRadio Music Festival at MGM Grand Garden Arena, Las Vegas.
Flaunting her tiny waist in the barely-there outfit, Miley looked unapologetic about all the controversy she's caused recently.
During the actual performance on stage at the music festival, Miley changed into a corset-style white bra top and matching knickers.
The appearance came just days after her ex-fiancé, Hunger Games actor Liam Hemsworth, was pictured kissing actress Eiza González.
Miley and Liam only confirmed that their engagement was over last week after months of speculation about their relationship.
According to some onlookers, Miley became emotional while singing new single 'Wrecking Ball' which is said to be about Liam.
Do you like Miley's style or think she should cover up? Tell us what you think!
Watch the video for Miley's single 'Wrecking Ball' below: