The light-up, robotic hat famously worn by Jamiroquai frontman Jay Kay in the music video for 2017’s “Automaton” has gone missing, the band reported this week.

According to an alert on the Jamiroquai social media accounts, the hat, which has been a centerpiece of Jamiroquai’s live performances in the ensuing years, disappeared during a train ride in North London on Tuesday. The band is “calling all eagle eyed commuters and residents” to be on the lookout for the distinctive headpiece.

Jamiroquai – “Automaton” (Official Music Video)

“Lost in transit on a train from Kings Cross to Luton, the Automaton hat has gone walkabout,” the post explained. “Cased in an orange plastic waterproof box (see photo), the hat is non functioning and was on its way for repair in advance of Jamiroquai’s headline festival run which starts later this month. The hat is fragile and we miss it badly, reward offered for information leading to its return.”

Jamiroquai is offering a reward for information leading to the hat’s return. Reach out to the band on Instagram if you can help crack the case.

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As mentioned in the band’s post, Jamiroquai is preparing for a run of European festival gigs, with headlining performances scheduled at Prague, Czech Republic’s Metronome Prague Music and Arts Fair (June 22nd), Lido di Camaiore, Italy’s La Prima Estate (June 24th), Lancashire, United Kingdom’s Lytham Festival (June 28th), and Madrid, Spain’s Festival Río Babel (July 2nd). For a complete list of upcoming Jamiroquai performances, head here.

Here’s hoping the “Automaton” hat finds its way home in time. Otherwise, it might be time to dig this bad boy out from the back of the closet.