A range of Miley Cyrus jewellery has been removed from shops in America after it was found to have a dangerous type of metal in it.
The necklaces and bracelets, which are made in China, have been on sale in Wal-Mart which is the world's biggest chain of stores.
Tests showed the jewellery contained levels of a metal called cadmium.
It's ok if you're just wearing it, but if you suck, bite or swallow any of the metal it can be dangerous.
The company said: "We are removing all of the jewellery from sale while we investigate."
Too much cadmium can cause your bones to get softer, give you kidney problems, or even in some cases cause problems in your brain.
And younger girls are more at risk of the effects.
'Not for kids'
But the companies involved say the dangerous items weren't being aimed at young kids, and were labelled for 14 and above.
It's not thought that any of the jewellery has been sold in the UK.
But if you think you do have some you should let your parents know straight away.