Selena Gomez Makes a Second Trip to the Hospital

Bauer Griffin

Selena Gomez was rushed to the hospital after filming The Tonight Show Thursday night, and one trip just didn't do it -- TMZ reports the starlet was taken back to an LA hospital Saturday for blood pressure issues.

Selena Gomez (FlynetPictures.com)The Disney star, who's dating teen sensation Justin Bieber, complained of nausea and a severe headache Thursday. The nausea component, of course, sparked a flurry of pregnancy rumors about the 18-year-old actress. And, they're totally not true.

New reports indicate the starlet's been in and out of the hospital for blood pressure issues, but doctors have yet to figure out what's wrong.

Her rep released a statement after her overnight hospital stay Thursday, announcing that Selena was undergoing "routine tests."

An insider said no one knew anything was wrong during her talk show appearance that night. 

"She did a backstage interview and hung out with Jim Carrey after the show. The Tonight Show people didn't even know she wasn't feeling well," the source said (via Us magazine).

Selena was supposed to kick off her 10-city tour at Santa Monica Place, but the concert was rescheduled for Monday. As of Sunday morning, the show had not been rescheduled again.