Selena Gomez under wraps at SoCal hospital

BURBANK, Calif., June 11 (UPI) -- Selena Gomez's weekend appearance at a Santa Monica mall was rescheduled after the teenage star checked into a hospital earlier in the week.

The Los Angeles Times said Saturday Santa Monica Place had announced Gomez would be there Monday rather than Sunday as originally scheduled.

The move came as Gomez, 18, apparently remained at Providence Saint Joseph Medical Center in Burbank after she became ill Thursday following a taping of NBC's "The Tonight Show with Jay Leno."

A source told HollywoodLife.com Gomez checked in under an assumed name and was undergoing tests, but offered no details on her condition.

The hospital and Gomez's representative shed no light on Gomez's condition.

The Times said her celebrity boyfriend Justin Bieber took to Twitter Friday with a public get-well wish.