What's a girl to do after she breaks off her engagement?
If you're Kelly Osbourne, head straight to Sin City!
After announcing she was splitting with fiancé Luke Worrall on Facebook and making cheating allegations on Twitter, Kelly packed her bags and headed to Vegas, where she was celebrating her best friend Blake Wood's birthday.
And despite her fresh heartbreak, Kelly seemed "really happy" during her night out, according to eyewitnesses...
She started her night at Union restaurant at Aria resort, where she, Blake and their group had ultimate surf and turf, king crab and jalapeno tacos.
After dinner, it was off to Haze nightclub, where they watched Common perform. "Her group was having lemon drop shots and partied until the wee hours of the morning," a source tells me. "Kelly wasn't drinking, but she seemed really happy."
Notice how the engagement ring is off in this picture. Looks like she's rebounding nicely!