Selena Gomez Taken To Hospital

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After Selena Gomez's appearance on "The Tonight Show" last night, the singer-actress was taken to the hospital, according to TMZ.

Gomez was reportedly "feeling horrible during and after the show, complaining of nausea and a severe headache."

She is still at the hospital today, where she is undergoing "routine" tests. The exact nature of her illness has not been disclosed.

A planned Gomez appearance to promote her film "Monte Carlo" in San Monica today has been cancelled.

While boyfriend Justin Bieber has not commented on the news, "#prayforselena" and "#getwellselena" have already shot up to Twitter's trending topics list.