Green Day frontman Billie Joe Armstrong may have to put aside some of the band's promotional activities while he enters rehab for substance abuse, but his appearance as a mentor on NBC's hit music competition 'The Voice' won't be one of them.

Deadline reports that the musician, who was recently announced as a mentor for Christina Aguilera's team, will still be part of the upcoming episodes. "We're taped and all set," an NBC representative stated about Billie Joe's time on the program, which was filmed over the summer and will air in the upcoming weeks.

It was a rough weekend for the vocalist, who suffered an onstage meltdown in Las Vegas Friday night after noticing the band's set time was running low. The vocalist stopped a song to go on a tirade that included numerous expletive-filled outbursts and ended with Armstrong smashing his guitar and flipping off those he felt were responsible for the time constraint.

By Sunday, the group had offered a statement that Armstrong was entering rehab to seek treatment for substance abuse. They also apologized for Friday's outburst at the iHeartRadio Festival in Las Vegas and clarified that their set had not been cut short by organizers. In addition, the band announced that a number of promotional appearances would be affected by the singer's treatment stint.

Green Day's '¡Uno!' album arrives in stores tomorrow.