Stay at home, celebrities like Ariana Grande and Taylor Swift tell fans

'This is the time to cancel plans,' Taylor Swift urges fans.

As the United States authorities stepped up calls for Americans to move beyond hand-washing and isolate themselves as much as possible, pop stars Taylor Swift and Ariana Grande and actor Arnold Schwarzenegger added their voices to celebrities appealing for drastically reduced social interactions.

"I'm seeing lots of get-togethers and hangs and parties still happening. This is the time to cancel plans, actually truly isolate as much as you can," Swift posted on social media on March 15. "It's a really scary time, but we need to make sacrifices right now," the Fearless singer said.