Selena Gomez Hospitalized

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Selena Gomezwas rushed to the hospital last night after she appeared on "The Tonight Show with Jay Leno," ET confirms.

"Last night after Selena's appearance on 'The Tonight Show' she wasn't feeling well and was taken to the hospital. She is currently undergoing routine tests," her rep says.

Selena was scheduled to launch a ten-city mall tour themed to her upcoming film 'Monte Carlo', out July 1st, this afternoon at the Santa Monica Place in Santa Monica, CA. Her appearance has since been canceled.