If Lady Gaga was trying to disprove her foe Kelly Osbourne’s mother’s assertion that she is an “attention-seeking hypocrite,” splitting her pants down the middle while performing in Vancouver probably wasn’t the best way to do it.

The 26-year-old “Born This Way” singer was performing her song “Heavy Metal Lover” in a skintight latex catsuit at Vancouver’s Rogers Arena when she unexpectedly gave thousands of fans a glimpse of a little more skin than she had probably intended. As Gaga jumped onto a motorcycle during part of her performance, a seam in the back of her Versace pants split, revealing her bum to the world, reported E! News.

Although the malfunction didn’t reveal anything that Little Monsters hadn’t already seen, it probably wasn’t the aesthetic Gaga had been aiming for, especially on the heels of Sharon Osbourne’s, er, crack that the singer is attention-seeker.

Kelly Osbourne appears to have cooled off, but she and Gaga have feuded for years and came to blows again earlier this month when Osbourne accused the pop diva of not taking responsibility for her fans’ hurtful comments. In an interview with Fabulous magazine, Osbourne said that despite losing 50 pounds she is still taunted over her weight.

"I'm the thinnest I’ve ever been and the healthiest I’ve ever been," the “Fashion Police” star told the publication. But regardless, she said, "I get called fat all the time. A big fat whore."

And Osbourne said most criticisms lobbied at her come from Lady Gaga’s fans, even though the singer admits suffering from a longtime eating disorder.

"Lady Gaga’s fans are the worst," said Kelly. "They’ve said I should kill myself, that they hope I get raped. I mean it’s crazy, but I’ve had this all my life and I just try and ignore it."

Days after Osbourne’s magazine interview, Gaga responded in a post on her Little Monsters blog.

“I have empathy for you, Kelly, but I feel it culturally important to note that you have chosen a less compassionate path,” Gaga responded. “Your work on E! with the Fashion Police is rooted in criticism, judgment, and rating people's beauty against one another. 'Appearance' is the most used reason for bullying in the world. Your show breeds negativity, and over the years has even become comedic in nature.”

The feud seemed to take a turn for the worse Thursday, when Kelly’s mother Sharon authored an open letter on Facebook, calling on the singer to take action for the bullying of her daughter.

Sharon described Gaga as “nothing more than a publicly-seeking hypocrite and an attention seeker" in the post and said that her blog post had been “full of contradictions.”

"I am calling you a bully because you have 32 million followers hanging on your every word and you are criticizing Kelly in your open letter," Sharon wrote. "Are you so desperate that you needed to make this public? A word from you would stop all the hideous, negative and vile threats from your 'little monsters.’”