Sharon Osbourne thinks Kanye West has an "obsession" with Taylor Swift and her success.

The pair's friendship soured even further in the past few days after the rapper's wife Kim Kardashian leaked a private conversation between the musical pair.

In the Snapchat clips, Swift was heard approving his song 'Famous' - but she says she never actually heard the whole track.

Speaking on The Talk, Osbourne said she thinks West is fixated with Swift, who he first riled up in 2009 at the MTV VMAs by invading her stage.

She said: "I think he's obsessed with the power that she has, with the money that she has... but he picked on the wrong one.

"He never thought that Taylor would become the powerhouse that she has become. And he doesn't have that power in the music industry that she has."

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Watch Kanye West speak to Taylor Swift on the phone below: