Ozzy Osbourne fans have rushed to social media after spotting a sad 'Changes' duet reference in his daughter Kelly Osbourne's emotional tribute.

The legendary Black Sabbath rocker, who was dubbed the Prince of Darkness, died “surrounded by love” Tuesday at age 76.

On July 22, Kelly Osbourne, along with mom Sharon Osbourne, siblings Jack Osbourne and Aimee Osbourne, as well as half-sibling Louis Osbourne, from the singer's previous marriage to Thelma Riley, released a statement confirming the Black Sabbath lead singer's death.

Kelly Osbourne spoke out for the first time since Ozzy Osbourne's death on Thursday, July 24. The rocker and father of six died on Tuesday, July 22, at 76 years old. Kelly shared a poignant line from the Black Sabbath song "Changes,

"He was and will continue to be a rock n roll legend," Cooper said in a statement, hours after Osbourne died on Tuesday.

The coveted items, expected to sell anywhere between $5,000 and $40,000, will be available for bidding through August 8.