Celebrities such as Brooke Shields and Josh Groban have stepped in to host the daytime talk showKelly Clarkson has been absent from The Kelly Clarkson Show for nearly a week — and viewers are wondering why.

The Kelly Clarkson Show has gone on without its host, and guest hosts including Wanda Sykes, Brooke Shields, and Kevin Hart, Roy Wood Jr., Simu Liu, and Willie Geist have stepped in to fill her shoes. Molly Sims returns to host the show today, March 14. The unexplained absence has caused concern among Clarkson’s fans.