Selena Gomez "In and Out" of Hospital Over the Weekend, but "Feeling Stronger"

Singer-actress is on the rebound after she was hospitalized last Friday

Some great news on the Selena Gomez front.

A source close to the Disney superstar tells E! News the pop princess was "in and out" of a Los Angeles-area hospital over the weekend for tests and checkups, but is doing much better since falling ill and seeking emergency medical attention after last Thursday's Tonight Show appearance.

"She spent the weekend resting and feels stronger," the insider tells us. "No more nausea or dizziness."

The 18-year-old Gomez apparently suffered from a nasty combination of exhaustion and food poisoning, and her condition was worrisome enough that boyfriend Justin Bieber  skipped Friday night's Stanley Cup Finals featuring his hometown team, the Vancouver Canucks.

A rep for the Disney star said that Gomez and her band, The Scene, will go ahead with an afternoon performance today at a mall in Santa Monica as scheduled.

UPDATED at 11:53 a.m.: Selena just took to Twitter to provide an update on her condition:

"Feeling much better, thank you all for being so understanding. Can't wait to see you all today at Santa Monica.