HOLLYWOOD, Calif. — Lady Gaga was forced to postpone her Thursday night concert at Purdue University's Elliott Hall of Music after she collapsed backstage.

"I've been crying for hours, I feel like I let my fans down 2nite. An hour before the show, I was feeling dizzy and having trouble breathing," the 23-year-old pop star explained of the sudden cancellation on Twitter.

Gaga said paramedics told her backstage that she was suffering from an irregular heartbeat, "a result of exhaustion and dehydration."

HOLLYWOOD, Calif. — Gary Coleman has been hospitalized after falling ill early Wednesday in Los Angeles, the Associated Press reports.

The 41-year-old actor was in town doing promotional work at a hotel when he fell ill, prompting an emergency call around 8 a.m. Coleman was transported to a local hospital via ambulance for tests, but his agent, Robert Malcolm, said the former Diff'rent Strokes was hospitalized as a precautionary measure.

LOS ANGELES — Elton John is still lending his support to Eminem as the controversial rapper attempts to beat a drug addiction.

"I've been helping Eminem over the last 18 months and he's doing brilliantly," the 62-year-old John shared in an interview with BBC Radio's Danny Baker.

In May, Eminem confessed to The Sun that he reached out to John as he sought to overcome his addiction to several prescription drugs, including the heroin substitute methadone. The unlikely pair first hit it off when they performed together at the 2001 Grammys.

HONOLULU, Hawaii — Rush Limbaugh is recovering after being rushed to a Honolulu hospital Wednesday with chest pains.

"Rush was admitted to a Honolulu hospital yesterday and is resting comfortably after suffering chest pains," read a statement on Limbaugh's official Web site. "Rush appreciates your prayers and well wishes. He will keep you updated via RushLimbaugh.com and on Thursday's radio program."