Kelly officially declares war on Christina Aguilera, while Jack has simpler ambitions - he just wants to celebrate his birthday at Medieval Times.

Ozzy starts the family vacation in a miserable mood, but perks up after a trip to a battleship memorial and a private luau. Meanwhile, Jack’s friends tag along and manage to embarrass him at every turn.

As Kelly’s career heats up, she grows weary of the nonstop interviews and photo shoot, prompting Ozzy to step in with some fatherly support.

A flea infestation wreaks havoc on the Osbourne household, leaving the pets frantic and the family itchy and miserable.

Sharon's feeling the heat from the powers that be behind her talk show, so she recruits Ozzy as her unlikely cohost. Back at home, the Osbournes' property undergoes some re-decorating.

With the family off to New York, Ozzy is thrilled to have the house to himself. Sharon hopes he’ll bond with Robert, but the two mostly steer clear of each other.

After accepting a peace offering from her folk-singing neighbors, Sharon finds no peace at all—the neighbors on the other side take up tennis, playing obsessively at all hours. As sleepless nights mount, three of the Osbournes’ cats vanish without a trace, and Sharon begins to suspect foul play.

Ozzy spirals into obsession after misplacing a $100,000 diamond pinkie ring and begs Sharon to cool it on the jewelry shopping. Meanwhile, Colin the dog earns an unplanned trip to the vet .

Kelly brings in her friend Sarah to drum for her band, while Jack’s buddy Dill returns for another stay. Meanwhile, one freshly fixed dog gets a little too friendly with the rest of the animals.

Jack pays a visit to Courtney Love’s home and meets Brieann, Kurt Cobain’s sister, who’s staying there. Meanwhile, Sharon is unexpectedly moved after discovering Jack’s secret tattoo.

In the season 3 finale, Kelly keeps hanging out with Rob but insists she’s too young to be tied down. Jack and Kelly go to Vegas, meanwhile Ozzy and Sharon celebrate Valentine’s Day together.

Ozzy keeps up his training with a goal to run five miles on his 54th birthday. The family celebrates with a party, capped off by a homemade fireworks show from Jack and Robert.

Jack hits 18, scores a car, and tries to survive his driving test without wrecking it. Meanwhile, Kelly braces for round two in her ongoing feud with Christina Aguilera, this time on the stage of the MTV Europe Awards.

Ozzy and Kelly jet off to England to belt out their duet of ‘Changes’ on Top of the Pops, with Kelly’s boyfriend tagging along. The family holiday takes a dark turn when Ozzy wipes out on an ATV.

After three weeks in the hospital, Ozzy finally heads home to England to recover, developing a sudden sweet tooth for eclairs in the process. Meanwhile, Sharon struggles with her talk show woes and decides she’s had enough.

Ozzy hits the press circuit to promote his first album in six years, while Jack stirs up trouble on a camping trip. Back home, the family throws a big birthday bash for Kelly.

Sharon looks back on Season 1 and reflects on the show’s sudden, massive impact on the Osbournes’ lives.

Sharon reconnects with her father after more than two decades of silence, while Ozzy discovers a newfound obsession with burritos. Meanwhile, Jack and Kelly’s late-night partying leaves their parents thoroughly unimpressed.

Sharon and Ozzy plan to renew their vows on New Year’s Eve, but not everyone’s on board. Kelly objects to the rabbi officiating since they’re not Jewish, and Ozzy is less than enthusiastic about the preparations.

Sharon and Kelly plan a charity trip to Kenya, but Ozzy’s convinced they’ll come home with malaria, or not at all. The family gets a visit from Sir Elton John before heading to a Covenant House auction, where Sharon picks up an award and Kelly unexpectedly jumps in on the bidding.

After injuring his leg on tour, Ozzy is forced to take a break—just as Jack and Kelly turn the house into an all-night party zone.

Jack invites his lazy skater friend Jason Dill to stay at the house, much to Ozzy and Sharon's dismay.

Kelly gets a new boyfriend but keeps him far from home, worried the family will scare him off before he even makes it through the door.

Ozzy grows increasingly anxious about Sharon's health. Her immune system is shot from the chemo, and the dogs run wild through the house. He cleans obsessively, urging everyone to wear gloves and masks.

The family decides to go to Las Vegas for Kelly's 18th birthday.