Motorhead called off its appearance at the Monsters of Rock festival in Brazil when frontmman Lemmy Kilmister became ill just hours before they were to take the stage today.

Media reports said Lemmy was suffering from gastric distress and dehydration. He was to undergo tests at a local hospital. Today's episode isn't the first health issue for Lemmy, now 69. Motorhead, for instance, had to cancel a series of shows in early 2014; there were missed dates in 2013, as well.

“He’s been up and down — he’s got a really bad diabetic problem and it changes on a daily basis,” Motorhead manager Todd Singerman said early last year. “A lot of it is fighting the bad habits, the things he’s not supposed to do any more. He’s stopped smoking, but he probably sneaks Jack and Coke here and there — he’d be lying if he said he’d stopped.”

Two different groups rushed to fill in today at the Monsters of Rock festival. Guitarist Phil Campbell and drummer Mikkey Dee, both bandmates of Lemmy's, were to take part in a loose jam at Sao Paulo's Arena Anhembi with members of Sepultura and others. Judas Priest was also reportedly set to play an extra 30 minutes in their subsequent slot.

Ozzy Osbourne closes out the day's schedule of performers. The slate for Sunday (April 26) includes Kiss, Yngwie Malmsteen, Steel Panther and others.

See Motorhead and Other Rockers in the Top 100 Albums of the '80s

Criminally Underrated Rock Albums