Osbourne, 25, initially did not explain what prompted the online outburst with Worrall, 20.
On Wednesday, Osbourne took to Twitter to thank supporters and say she would not comment about the relationship because “enough damage has already [been] done.”
But in lashing out at an online critic, the ex-“Dancing with the Stars” performer later seemed to indicate she believed Worrall had cheated on her, a charge also leveled by celebrity blogger Perez Hilton.
“What your saying is that im ugly so it was ok for him to cheat,” Osbourne tweeted, before dismissing the critic with an expletive.
Osbourne followed up a couple hours later by linking to the En Vogue song “My Lovin’ (Never Gonna Get It).”
"You can take my heart but NEVER my sense of humor! I have decided to comment through song and i believe en vogue says it best!" she wrote.