Aerosmith performed in Las Vegas on April 23, but was notably missing their drummer, Joey Kramer.

The band is currently in the midst of their Deuces Are Wild Las Vegas residency. Kramer’s drum technician and assistant, John Douglas, had to fill in for him during that performance.

Aerosmith has not yet commented on Kramer’s absence, but the musician has taken a break from performing before in 2014 due to a heart ailment. Here’s hoping the drummer is fine and does not have health issues.

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