Selena Gomez a.k.a. Justin Bieber's girlfriend Hospitalised

Selena Gomez was taken to an L.A.-area hospital Thursday(09Jun11) after taping an appearance on "The Tonight Show With Jay Leno" and remained there Friday undergoing what her rep called "routine tests."

The "Wizards of Waverly Place" actress, a.k.a. Justin Bieber's girlfriend, was promoting her romantic comedy "Monte Carlo," which opens July 1.

"She is currently undergoing routine tests," her rep told People on Friday. Sources told TMZ that Gomez, who turns 19 next month, had been suffering from a severe headache and nausea.

Gomez was to have played an outdoor concert Friday afternoon at Santa Monica Place, kicking off a 10-stop mall tour, but that show was canceled.