SelenaHospital230.jpgSelena Gomez's rep has confirmed to X17online that she was rushed to the hospital Thursday night after complaining of nausea, saying:

    "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."

Check out the video of Selena's interview with Jay Leno after the jump ... does she seem sick?

The singer spoke with the talk show host about her relationship with boyfriend Justin Bieber.

Selena, 18, and Justin, 17, just got back from a Hawaiian vacation together.