Kelly Osbourne has made it clear that she's on Team Miley and on Team Bieber.
Team Paris Hilton? Not so much.
After attending the Coachella Music Festival in California this weekend, Osbourne took Twitter and lashed out at her former rival with the following message:
"@ParisHilton please grow up there is no need to act like a child you could of happily joined us! it’s not 2005 no one cares!"
It's unclear exactly what went down at Coachella between the D-Listers, but Great Britain's The Daily Mirror claims it's all Hilton's fault."
"Kelly was sitting with some mates, minding her own business, when Paris suddenly started b--ching and moaning, and slagging her off," a source tells that newspaper, adding: “
She was asked by someone else to join the group, but declined and swanned off. The pair didn’t speak for the rest of the weekend."
This was not what went down according to another insider, however: Paris Hilton herself!
"@KellyOsbourne getting tweets about us," the ex-reality star Tweeted today. "I’m confused, as I did not see you once this entire weekend. No clue how these stories get invented."
We'll do our best to get to the bottom of this possible feud, while trying to decide whether or not to included these two in the following collection: