Looks like Kelly Osbourne may be back to her old ways. Apparently after 3 years of sobriety, the 27-year-old is back to drinking alcohol.

“Kelly is definitely off the wagon again — at least when it comes to drinking,” reveals an insider. “I’ve seen her out drinking cocktails, beer and champagne numerous times, and I’ve seen her pretty unsteady on her feet too.”

Just this past Sunday, Osbourne was spotted chugging cocktails at a Golden Globes after-party and she got so trashed that she was almost falling over.

The fellow party goer also revealed that when Kelly drinks she becomes very vocal about her hatred of Christina Aguilera!

“When she gets drinking her hatred for Christina Aguilera really comes out,” the source said. “She spent the entire night talking about how much she hates Christina!”

If you don’t already know, Kelly hates Christina because when Kelly was overweight Christina would make fun of her and call her fat.

Now that Christina has packed on the pounds Kelly has no problem letting people know how she feels, especially if she’s a little tipsy.

Good luck Kelly, try to keep it together!