Lady GagaLady Gaga fans in West Lafayette, IN. did not get to see the singer's 'Poker Face.'

According to WLFI.com, Gaga fell ill and was unable to perform for the sold-out crowd.

Two opening acts had already gone on before the audience was informed that the 'Bad Romance' star would not be taking the stage that night.

Gaga herself was very upset over the cancellation. "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," she tweeted.