Sam Smith canceled a performance at a museum gala due to illness.
The Grammy-winning Brit was scheduled to sing at the Los Angeles County Museum of Art's (LACMA) Art + Film Gala on Saturday (07Nov15).
However, he pulled out of the event after being ordered by doctors to go on vocal rest.
A representative for the museum, Miranda Carroll, told The Hollywood Reporter, "Sam Smith has fallen ill and regretfully was unable to perform tonight at the LACMA Art + Film Gala. He was required to go on vocal rest."
Singer Joe Walsh stepped in at the last minute to replace Sam, and he told the star-studded audience, "Well, here I am. I'm glad to be here, I think. I'm just gonna play a couple songs, and we'll see what happens."
Celebrities who were spotted at the event included LACMA co-chair Leonardo DiCaprio, Gwyneth Paltrow, Reese Witherspoon, Jared Leto, and Aaron and Sam Taylor Johnson.
It is not known when Sam is expected to recover. Last week (beg02Nov15), he revealed he was suffering from a throat infection, writing on Instagram.com, "Feeling very sorry for myself tonight. Throat Glands are so f**king big. Feel like I have a tennis ball down my throat."