Miley Cyrus got emotional in her first performance since calling off her engagement to Liam Hemsworth. The "We Can't Stop" singer took over the stage at the iHeartRadio music festival in Las Vegas today, where she twerked with a group of backup dancers, frolicked around in a skimpy white ensemble, and even started to tear up while performing her breakup anthem "Wrecking Ball." According to reports, Miley started crying while singing her new hit song, further fueling speculation that the pop number is about Miley's on-again, off-again relationship with Liam. Later, the singer changed into a barely there costume and took to the stage a second time. She also mingled backstage with Khloé and Kourtney Kardashian.
Miley isn't the only star at the big music festival this weekend. Katy Perry and Robin Thicke kicked off the festival last night, while Kate Hudson dropped by to add some Hollywood glamour to the event. Be sure to check out all the celebrities at the iHeartRadio music festival.