The 9 best celebrity 'I'm Busy' prank call TikToks, including Shaquille O'Neal and James Charles

• Celebrities are showing off the famous contacts on their phone as part of a TikTok prank trend.
• Pranksters FaceTime their celebrity friends. When they answer, the celebs ask to call back later.
• The prank gives followers a chance to see their favorite celebrities at their most candid.

Celebrities are giving fans a peek into their star-studded social lives in a new TikTok trend.

The trend is simple. A celebrity calls up another celebrity on FaceTime, says they're busy, and asks to call back later. The recipient of the call is confused, and then the TikTok cuts to the next celebrity.

The Kardashian-Jenner sisters and their momager, Kris Jenner, started the trend with a TikTok in December 2020. All five sisters - Kim, Kylie, Khloe, Kylie, Kendall - and their mom sat stone-faced in front of an iPhone as they called their famous friends on FaceTime. Videos of the calls went viral on social media.

Singer Justin Bieber, YouTuber James Charles, rapper Travis Scott, actress Lala Anthony, TikToker Addison Rae, and YouTuber David Dobrik all questioned what was going on when they received the call from the Kardashian crew. Comedian Dave Chapelle answered the phone and quipped, "Holy s---!"

Model Hailey Bieber was in the middle of eating as they called and looked puzzled. Rapper Taco asked if he was in trouble, while rapper Tyler, the Creator, stared right back and replied, "Can you see me?"

This trend evolved into what people are now calling the "I'm Busy" challenge.

Now that the trend has become popular, some recipients of the calls know what to expect when the caller says, "Hey, I'm busy, can I call you right back?"

Here are some of the best "I'm Busy" TikToks.