Lady Gaga’s tribute to the late British rocker David Bowie at the 2016 Grammys may have impressed many but one person did not seem to appreciate her performance.

Duncan Jones, son of the rock icon, made a cryptic Twitter post after the Grammy Awards show. “Overexcited or irrational, typically as a result of infatuation or excessive enthusiasm; mentally confused.’ Damn it! What IS that word!?” Jones, a filmmaker, tweeted.

“overexcited or irrational, typically as a result of infatuation or excessive enthusiasm; mentally confused.” Damn it! What IS that word!?

— Duncan Jones (@ManMadeMoon) February 16, 2016

Although Jones did not mention any names, fans thought that he was referring to the eccentric singer-songwriter, Lady Gaga, when he quoted the Oxford English Dictionary definition of the term “gaga” in his tweet.

The tribute to Bowie, who died of cancer earlier this year, was among the most anticipated performances of the 58^th Grammy Awards.

Lady Gaga channeled the Bowie persona Ziggy Stardust with her blue Marc Jacobs gown, bright orange hair, blue eye shadow, and huge killer heels, as she paid tribute to her “music hero.” She covered a medley of Bowie’s hit songs including “Space Oddity,” “Ziggy Stardust,” and “Rebel Rebel.”

“He is a true, true artist” — Lady Gaga on David Bowie before #GRAMMYs tribute https://t.co/0wRNBIyNUH pic.twitter.com/cWtuH9VVBY

— Hollywood Reporter (@THR) February 17, 2016

Despite the criticism she received from Jones, the crowd was amazed not only by her voice but also by the costume and the “digital skin” technology the production staff used for her number.

Duncan Jones Was Not Impressed By This Bowie Tribute by Lady Gaga at the Grammys

A source told Hollywoodlife that Lady Gaga was not offended by Jones’ tweet. The source claims that the singer respects his opinion.

“Lady Gaga believes everyone is entitled to their own opinion, including David Bowie’s son Duncan Jones,” the source told HollywoodLife.com.

“She is, and always has been, a huge fan of David Bowie, his music, and what he stood for. She gave it her all [at The Grammys] and hopes she did the legendary rocker justice. She’s just super grateful she got to pay her respects by honoring him on such a special night,” added the source.