Miley Cyrus is in big trouble with boyfriend Liam Hemsworth after he discovered texts from her ex Patrick Schwarzenegger on her phone!

Sources reveal exclusively to Life & Style magazine that Liam, 26, totally flipped on the "Wrecking Ball" singer.

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"Liam is worried Miley could leave him for Patrick, says a source.

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While the 23-year-old former Disney star is insisting the conversation with her ex is one-sided, she isn't too worried about the Australian actor breaking up with her.

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"And even though Liam is furious about the texts," a source explains, "Miley loves the attention."

For more on Miley and Liam, pick up the latest issue of Life & Style on newsstands now. For a look back at their rollercoaster relationship, check out the gallery below!