Like Tupac Shakur, The Notorious B.I.G. and others, record sales for the late pop icon Michael Jackson have spiked in the days following the singer’s untimely passing.

According to new reports, the demand for Jackson’s music has far exceeded the supply, leaving retailers rushing to fill backorders for The King of Pop.

Several Best Buy outlets are completely sold out of Michael Jackson albums and the 25th anniversary edition of Thriller is currently out of stock at online retail outlet

Bill Carr, vice president of music and video at Amazon says, “This is simply unprecedented.” In addition to the legendary Thriller album, Amazon is also out of all Jackson and Jackson 5 albums.

“We’ve seen the death of Johnny Cash and Frank Sinatra and many other artists, but none of them compare to what we’re witnessing today,” Carr added.

So exactly how popular is Jackson’s music these days?

“In the last 24 hours, we’ve actually sold more Michael Jackson albums in our MP3 and CD stores than we have in the 11 years since the launch of our music business,” he said.

For those who cannot get enough of Michael Jackson music, there may be one—or several—posthumous albums released.

Michael Jackson was 50-years-old.