Kelly Osbourne threw the ultimate birthday bash for her celeb BFF Miley Cyrus on Tuesday.
A source tells reporters that Osbourne rented out Beacher’s Madhouse inside the Hollywood Roosevelt Hotel to help the 19-year-old celebrate her special day.
“Her mom Tish went, and so did her boyfriend Liam [Hemsworth],” the source says of Cyrus. “The group was up until 3 a.m. just dancing up a storm and having fun.”
Cyrus seemed quite impressed with Osbourne’s planning skills, calling it “the best party ever” on Twitter. “Let’s just say there was a unicorn in the lobby!” (An onlooker tells E! News there was a horse with a horn attached to its head inside the soiree.)
Prior to Tuesday’s birthday blowout, Osbourne teased that it was “going to be the sickout thing [Miley has] ever seen in her life.”
“That was my mission for her, to make her birthday…the best day ever.”
Osbourne and Cyrus first became friends while shooting the comedy So Undercover. The film has yet to be released.
Kelly Osbourne is on the mend.
The 27-year-old E! Fashion Police cohost and Dancing With the Stars alum was treated at a Miami hospital this weekend after a scary incident that left her with a head injury.
“Long story short, I cracked my head open then kept passing out,” Osbourne — who was in Miami to attend a model casting call for Madonna‘s Material Girl clothing line — Tweeted Sunday. “I have the all clear [and] my mum [Sharon Osbourne] came to get me.”
While details are unclear as to the circumstances of her injury, Osbourne encouraged fans to watch her mom’s daytime series, The Talk, on Monday for the full story.
“I just want to thank all the incredible doctors and nurses at Mercy hospital in Miami for taking such good care of me,” Osbourne Tweeted. “You guys really are amazing!”
Kelly Osbourne has never been a fan of Christina Aguilera, but the 26-year-old took their feud to a new level during a recent episode of E!’s Fashion Police.
After Joan Rivers, 78, said Aguilera looked “stuffed into” a Givenchy LBD at an event in Munich, Germany last month, Osbourne chimed in: “Maybe she is just becoming the fat bitch she was born to be. I don’t know. She was a c**t to me. And she bought my house!”
Osbourne’s digs at 30-year-old Aguilera’s fluctuating weight didn’t end there. “She called me fat for so many f***ing years,” Osbourne continued, “so you know what? F**k you! You’re fat too.”
The 5-foot-2 Osbourne, who once weighed “almost 160” pounds, recalled once walking down the street when “some horrible obnoxious teenager screamed out a car window to me, ‘You’re fat!’ I went to my parents [Sharon and Ozzy] bawling, ‘I would rather be called ugly than be called fat!'”
After years of yo-yo dieting, Osbourne shed more than 48 pounds thanks to her 2009 stint on Dancing With the Stars — and she’s kept it off since!
“I just commit to half an hour a day. It doesn’t seem overwhelming and I can handle that,” she said in Oct. 2010. “I do half an hour on the treadmill and when I feel like doing more, I’ll do a few sit-ups and some weights.”