Kevin Winter/Getty; Jason Merritt/Getty
01/24/2012 AT 05:55 AM EST
made a fashionably late entrance to Beacher's Madhouse at the Roosevelt Hotel in Hollywood at 1 a.m. Sunday morning, showing off her new haircut
and wearing high-waist jeans and a black crop top. The singer made a beeline for pal Kelly Osbourne
and grabbed her to dance along to hits like "Without You" and "Superbass" while snapping pics. A few minutes later, Cyrus's boyfriend, Liam Hemsworth
, arrived, and after exchanging a kiss, the couple decided to call it a night, heading out with Osbourne in tow.