H2-O PLEASE: LADY GAGA COLLAPSES

Lady Gaga collapsed before last night's concert in Indiana.

A rep said, "Due to exhaustion and dehydration, Lady Gaga collapsed and passed out before her show tonight in West Lafayette, IN. Her physician has advised her to take a few days off to rest."Lady Gaga tweeted moments ago that she was feeling dizzy and having trouble breathing about an hour before the show.

Later, Gaga tweeted that she was feeling dizzy and having trouble breathing about an hour before the show.

She wrote: "Paramedics came to take care of me, and told me my heart-rate was irregular-- a result of exhaustion and dehydration. Can't apologize enough for how sorry I am. I could hear my fans cheering from my dressing room, I begged everyone to let me go onstage.

"My stage has complicated mechanical elements,everyone was concerned I'd be in danger during the 2hr show, since I had passed out earlier. I am so devastated. I have performed with the flu, a cold, strep throat: I would never cancel a show just based on discomfort."

Gaga added, "I hope you can forgive me. I love my little monsters more than anything, you are everything to me. I will make-up the performance on Jan 26."

Concertgoers can get refunds for last onight's show, or their tix will be honored at a makeup show scheduled for Jan. 26.