The singer, 21, wore a long black gown for the red carpet at this year's annual musical event held at the Staple Centre arena in LA. Teamed with a black wrap top, Miley flashed the flesh but still managed to look classy.
With her short blonde hair slowly growing out, Miley wore it swept to the side and put on lashings of her trademark red lippy.
But Miley made sure she wore something a little more eye-popping later on in the evening - an outfit she shared with her fans who weren't able to be there via Twitter.
The 'We Can't Stop' star ditched the dress for a red sequin crop top and pair of high-leg pants for her risqué performance.
Former child star Miley took to stage where she twerked up against a man dressed as Father Christmas and danced alongside a dwarf in silver.
She was previously criticised for her overly-sexual performance with Robin Thicke at the 2013 MTV Video Music Awards in August - but clearly she's not going to tame her behaviour any time soon!
Also performing last night (6 December) at the KIIS FM Jingle Ball was the likes of Selena Gomez, Ariana Grande and Enrique Iglesias.
Do you think Miley continues to shock or does she need to change her act? Tell us below!
Watch the video to Miley Cyrus' single 'Wrecking Ball' below: