Entertainment

Photo: The Canadian Press. All rights reserved.

Billie Joe Armstrong of Green Day performs at the iHeart Radio Music Festival on Friday, Sept., 21, 2012 at the MGM Grand Arena in Las Vegas. (Photo by Eric Reed/Invision/AP)

Green Day's Billie Joe Armstrong is headed to treatment for substance abuse.

Sunday's announcement by the band's representative comes after the 40-year-old frontman had a meltdown onstage at the iHeartRadio Music Festival in Las Vegas on Friday. As Green Day was wrapping up its performance during the all-star, two-day concert, Armstrong profanely complained that the band's time was being cut short.

"One minute left, one minute (expletive) left. You're gonna give me (expletive) one minute? ... I'm not (expletive) Justin Bieber, you (expletives)!" he yelled (although Bieber was not part of the night's festivities).

Armstrong smashed his guitar before leaving the stage.

In a statement to The Associated Press, Green Day apologized "to those they offended at the iHeartRadio Festival" and said its set was not cut short by Clear Channel, the host of the two-day festival.

The Grammy winning band also is cancelling some of its promotional appearances. It is due to release the album "Uno" on Tuesday, the follow-up to "21st Century Breakdown," released three years ago. "Uno" is the first in a trilogy of albums; the second is to be out in November, and the last in January. The band is due to kick off a nationwide tour Nov. 26 in Seattle.