Ora reposted the pic on her own Instagram, writing, "Nice to see you too."
The 24-year-old singer wore a black and white cheerleader outfit to the event, hosted by the Los Angeles-based hip hop station.
"Today Ima be your cheerleader @Power106LA coz we can!!! #bodyonme," she tweeted, with a pic of her wearing the uniform. The back of the crop top was embroidered with the title of her new hit single, "Body On Me," featuring Chris Brown.
Barker was married to model Shanna Moakler from 2004 to 2006. They share two kids together, Landon, 11, and Alabama, 9. Over the summer, Barker dated UFC ring girl and model Arianny Celeste.
Ora recently split from her boyfriend of over a year, Tommy Hilfiger's son, Ricky Hilfiger, in July. Ora was also previously linked to Calvin Harris in June and Rob Kardashian in 2012.
Even though Ora ended things with Kardashian a while ago, she left on a good note with the family. Watch the video below to see highlights from her hangout with Kardashian's stepsister Kendall Jenner at amfAR's 22nd Cinema Against Aids Gala in France back in May.