"I don't know...maybe...she's got an incredible voice," Perry told eonline.com at the iHeart Radio Music Festival here.
The 28-year-old also said that she was excited about Cyrus's new song "Wrecking ball" before it was released and she knew it would be a hit.
"I have heard her sing 'Wrecking ball' before that single came out and I tweeted about it a long time ago before it even came out and I was just so excited about it for her. She's got a set of pipes that are incredible," she added.
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